2024-03-29T02:33:34Zhttps://minerva.usc.es/oai/requestoai:minerva.usc.es:10347/230672023-07-10T06:17:38Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Environmental analysis of servicing centralised and decentralised wastewater treatment for population living in neighbourhoods
Arias Cisterna, Andrea
Rama Caamaño, Manuel
González García, Sara
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Decentralised systems
Economic approach
Life cycle assessment (LCA)
Resident carbon footprint
Water reuse
The planning and construction of large-scale wastewater infrastructure, such as sewerage networks and wastewater treatment plants, is undertaken by the public sector or by publicly regulated monopolies. Only on smaller scales can infrastructure be managed by private companies or through local collective initiatives. Within this framework of water cycle management, there is an increasing movement of the population towards cities where economic activity is concentrated. This scenario is particularly pronounced in certain regions of the world and makes it necessary to rethink whether decentralised treatment offers a way of ensuring the servicing of wastewater treatment in new urban developments, alleviating pressure on facilities that are at the limit of their capacity.
In this study four systems were evaluated: two centralised and two decentralised configurations, from an environmental and economic perspective, posing as working hypothesis how different wastewater treatment schemes influence the carbon footprint of the population living in a neighbourhood. The analysis of the results identifies that the decentralised systems present a reduction in the carbon footprint of residents of around 20–23 % depending on the technology considered. In addition, reclaimed water can meet the water quality requirements for irrigation of the green areas in the neighbourhood. Although decentralised systems have higher construction costs, they can be amortised due to lower energy consumption, so the payback time is estimated to be 8–9 years, lower than that of centralised systems. Considering the problems associated with changing and replacing existing networks, decentralised wastewater treatment systems is especially recommended for new dwelling developments, based on its environmental and economic indicators
2020-06-29
2022-06-28
2020
journal article
Journal of Water Process Engineering. Volume 37, October 2020, 101469. doi: 10.1016/j.jwpe.2020.101469
2214-7144
http://hdl.handle.net/10347/23067
10.1016/j.jwpe.2020.101469
eng
https://doi.org/10.1016/j.jwpe.2020.101469
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2014-14984/ES/
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/233132023-07-10T06:12:53Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Design and Characterization of Naphthalene Ionic Liquids
Fernández-Stefanuto, Verónica
Somoza Cerviño, Alba
Corchero Morais, Raquel
Tojo, Emilia
Soto Campos, Ana María
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Synthesis
Characterization
Surfactant
Ionic liquid
Enhanced oil recovery
Surfactants have a great number of applications. Among these chemicals, petroleum sulfonates have been widely used due to their effectiveness in reducing interfacial tension. This is the case of sodium octylnaphthalene sulfonate which is a solid with a very low solubility in water. To overcome these drawbacks, this work aimed to synthesize new surface active ionic liquids based on a naphthalene sulfonate anion and traditional cations of these salts (imidazolium, pyrrolidinium, and pyridinium). The new chemicals showed high thermal stability, ionic liquid nature, and a stronger surfactant character than the original naphthalene. Moreover, they were found to be water soluble which greatly facilitates their application in the form of aqueous formulations. 1-Hexyl-3-methylimidazolium 4-(n-octyl)naphthalene-1-sulfonate showed the best capacity to reduce water-air and water-oil interfacial tension
2020-09-29
2020-09-29
2020
journal article
Fernández-Stefanuto V, Somoza A, Corchero R, Tojo E and Soto A (2020) Design and Characterization of Naphthalene Ionic Liquids. Front. Chem. 8:208. doi: 10.3389/fchem.2020.00208
http://hdl.handle.net/10347/23313
2296-2646
eng
https://doi.org/10.3389/fchem.2020.00208
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-097342-B-I00/ES/DISEÑO DE FORMULACIONES BASADAS EN LIQUIDOS IONICOS PARA LA RECUPERACION MEJORADA DEL PETROLEO
http://creativecommons.org/licenses/by/4.0/
open access
Copyright © 2020 Fernández-Stefanuto, Somoza, Corchero, Tojo and Soto. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms
Frontiers
oai:minerva.usc.es:10347/224262020-05-20T02:01:41Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Novel microwave-assisted synthesis of the immunomodulator organotellurium compound ammonium trichloro( dioxoethylene- O, O') tellurate ( AS101)
Vázquez Tato, María del Pilar
Mena Menéndez, Alberto
Feás Sánchez, Xesús
Seijas Vázquez, Julio Antonio
Universidade de Santiago de Compostela. Departamento de Química Orgánica
Tellurium
AS101
Ammonium trichloro[1,2-ethanediolato-O,O']-tellurate
Microwave irradiation
Antitumoral
Ammonium trichloro[1,2-ethanediolato-O,O']-tellurate (AS101) is the most
important synthetic Te compound from the standpoint of its biological activity. It is a
potent immunomodulator with a variety of potential therapeutic applications and
antitumoral action in several preclinical and clinical studies. An experimental design has
been used to develop and optimize a novel microwave-assisted synthesis (MAOS) of the
AS101. In comparison to the results observed in the literature, refluxing Te(IV) chloride
and ethylene glycol in acetonitrile (Method A), or by refluxing Te(IV) chloride and
ammonium chloride in ethylene glycol (Method B), it was found that the developed
methods in the present work are an effective alternative, because although performance
slightly decreases compared to conventional procedures (75% vs. 79% by Method A, and
45% vs. 51% by Method B), reaction times decreased from 4 h to 30 min and from 4 h to
10 min, by Methods A and B respectively. MAOS is proving to be of value in the rapid
synthesis of compounds with new and improved biological activities, specially based on
the benefit of its shorter reaction times
2020-05-19
2020-05-19
2014
journal article
Vázquez Tato, M.P., Mena Menéndez, A., Feás Sánchez, X. y Seijas Vázquez, J.A. (2014). Novel microwave- assisted synthesis of the immunomodulator organotellurium compound ammonium trichloro( dioxoethylene- O, O') tellurate ( AS101). Int.J.Mol.Sci., vol. 15, 3287-3298
http://hdl.handle.net/10347/22426
10.3390/ijms15023287
1422-0067
eng
https://doi.org/10.3390/ijms15023287
http://creativecommons.org/licenses/by/3.0/
open access
© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/)
MDPI
oai:minerva.usc.es:10347/268162021-08-18T02:02:22Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Characterization of Alkanolamine Blends for Carbon Dioxide Absorption. Corrosion and Regeneration Studies
Sánchez Bautista, Alfredo
Palmero, Ester M.
Moya, Alberto J.
Gómez Díaz, Diego
La Rubia, M. Dolores
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Carbon dioxide
Absorption
2-amino-2-methyl-1-propanol
1-amino-2-propanol
Electrochemical corrosion
AISI 420
Density
Viscosity
Surface tension
Regeneration capacity
There are a lot of research programs focusing on the development of new solvents for carbon dioxide capture. The most important priority should be reducing the energy consumption needed at the regeneration step, but minimizing solvent degradation and its corrosivity is also considered as a priority. In this research, the aqueous blends of 2-amino-2-methyl-1-propanol (AMP: 1 kmol·m−3) and 1-amino-2-propanol (MIPA: 0.1–0.5 kmol·m−3) are characterized in terms of density, viscosity, and surface tension. The carbon dioxide absorption rate and capacity, the regeneration capacity, and the corrosivity of these solvents are also evaluated
2021-08-17
2021-08-17
2021
journal article
Sustainability 2021, 13(7), 4011; https://doi.org/10.3390/su13074011
http://hdl.handle.net/10347/26816
10.3390/su13074011
2071-1050
eng
https://doi.org/10.3390/su13074011
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
MDPI
oai:minerva.usc.es:10347/157382023-07-10T06:16:00Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Filamentous bacteria existence in aerobic granular reactors
Figueroa Leiro, Mónica
Val del Río, María Ángeles
Campos Gómez, José Luis
Méndez Pampín, Ramón José
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Aerobic granulation
Chloroflexi
Industrial wastewater
Meganema perideroedes
Sphaerotilus natans
Thiothrix
“The final publication is available at Springer via http://dx.doi.org/10.1007/s00449-014-1327-x”
Filamentous bacteria are associated to biomass settling problems in wastewater treatment plants. In systems based on aerobic granular biomass they have been proposed to contribute to the initial biomass aggregation process. However, their development on mature aerobic granular systems has not been sufficiently studied. In the present research work, filamentous bacteria were studied for the first time after long-term operation (up to 300 days) of aerobic granular systems. Chloroflexi and Sphaerotilus natans have been observed in a reactor fed with synthetic wastewater. These filamentous bacteria could only come
from the inoculated sludge. Thiothrix and Chloroflexi bacteria were observed in aerobic granular biomass treating wastewater from a fish canning industry. Meganema perideroedes
was detected in a reactor treating wastewater from a plant processing marine products. As a conclusion,the source of filamentous bacteria in these mature aerobic granular systems fed with industrial effluents was the incoming wastewater
2017-08-11
2017-08-11
2015
journal article
Figueroa, M., Val Del Río, A., Campos, J. L., Méndez, R., & Mosquera-Corral, A. (2015). Filamentous bacteria existence in aerobic granular reactors. Bioprocess and Biosystems Engineering, 38(5), 841-851, doi:10.1007/s00449-014-1327-x
1615-7591
http://hdl.handle.net/10347/15738
eng
http://dx.doi.org/10.1007/s00449-014-1327-x
info:eu-repo/grantAgreement/MEC/Plan Nacional de I+D+i 2004-2007/CSD2007-00055/ES/Concepción de la EDAR del siglo XXI. Desarrollo, implementación y evaluación de tecnologías para el tratamiento y recuperación de recursos en aguas residuales
info:eu-repo/grantAgreement/MICINN/Plan Nacional de I+D+i 2008-2011/CTQ2011-22675/ES/RECICLADO DE AGUAS RESIDUALES Y LODOS PARA PRODUCIR MATERIALES PLASTICOS
open access
© Springer-Verlag Berlin Heidelberg 2014
Springer Verlag
oai:minerva.usc.es:10347/312712024-02-16T13:06:44Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Pursuing single or combined wheat straw based poly(butylene succinate) production routes: A life cycle approach of first- and second-generation feedstocks
Rebolledo-Leiva, Ricardo
Ladakis, Dimitrios
Ioannidou, Sofia-Maria
Koutinas, Apostolis
Moreira, Maria Teresa
González-García, Sara
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
PBS
Life cycle assessment
Bioplastics
Polymers
Bioeconomy
The depletion of fossil resources and the climate change crisis call for an urgent shift to production pathways based on renewable and low-carbon sources. In addition, plastic pollution worldwide motivates the identification of new sources for their bio-based counterparts, which have an increasing demand. This research aims to evaluate the environmental feasibility of different cereal-based feedstocks for the production of poly(butylene succinate) (PBS), which is obtained from the polymerisation of succinic acid (SA) and 1,4 butanediol (BDO) monomers. The baseline scenario analysed corresponds to the use of wheat straw as a source of the fermentable sugars. Furthermore, five other cereal-based production routes combining first-generation (1G) feedstocks such as wheat and maize grain, and second-generation (2G) feedstocks, such as sorghum, barley straw, and maize stover, combined with wheat straw, were evaluated. The Life Cycle Assessment (LCA) methodology was used to identify the main hotspots of these valorisation routes at the early stage of the biorefinery design, considering all the burden categories provided by the ReCiPe impact method. The results showed that the straw-based PBS profile reached a Global Warming Potential of 3.43 kg CO2eq, whereas a range value from 2.34 to 7.27 kg CO2eq was estimated when wheat straw is combined with sorghum and barley straw, respectively. The pre-treatment stage represents a substantial impact on the strategy considered to produce fermentable sugars, particularly, for barley straw. Therefore, improvements are still required to reduce the energy demand and increase the sugar yield
2023-11-14
2023-11-14
2023-08-06
journal article
Sustainable Materials and Technologies 37 (2023) e00683
2214-9937
http://hdl.handle.net/10347/31271
10.1016/j.susmat.2023.e00683
eng
https://doi.org/10.1016/j.susmat.2023.e00683
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PCI2020-111978/ES/MEJORA DE LA DIVERSIDAD EN LOS SISTEMAS DE CULTIVO DE CEREALES MEDITERRANEOS/
info:eu-repo/grantAgreement/AEI/Programa Estatal para Impulsar la Investigación Científico-Técnica y su Transferencia convocatoria 2021/TED2021-130309B-100
http://creativecommons.org/licenses/by-nc/4.0/
open access
© 2023 The Authors. Published by Elsevier B.V. This article is available under the Creative Commons CC-BY-NC license and permits non-commercial use, distribution and reproduction in any medium, provided the original work is properly cited
Atribución-NoComercial 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/184132022-08-29T11:33:43Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888com_10347_2919com_10347_2891col_10347_15636col_10347_12262col_10347_10699oai:minerva.usc.es:10347/233272023-07-10T06:12:46Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Ionic Liquids derived from proline: application as surfactants
Fernández-Stefanuto, Verónica
Corchero Morais, Raquel
Rodríguez Escontrela, Iria
Soto Campos, Ana María
Tojo Sierra, Rafael
Universidade de Santiago de Compostela. Departamento de Química Orgánica
Amino acids
Enhanced oil recovery
Ionic liquids
Prolinium
Surfactants
This is the peer reviewed version of the following article: V. Fernández-Stefanuto, R. Corchero, I. Rodríguez-Escontrela, A. Soto, E. Tojo, ChemPhysChem 2018, 19, 2885, which has been published in final form at https://doi.org/10.1002/cphc.201800735. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
Ionic liquids derived from prolinium esters, previously described as fully green and stable, were found to decompose in the presence of water by ester hydrolysis. To avoid this problem, a new family of these biodegradable salts incorporating an alcohol instead of the ester group is proposed. From this family, two novel ionic liquids that incorporate the prolinolium cation [HOPro] and the [DS] or [DBS] anion were selected (DS=dodecylsulfate; DBS=dodecylbenzenesulfonate). Both salts are liquid at room temperature, a property not usually found in ionic surfactants, and are also chemically and thermally stable. Moreover, they are more effective in reducing the surface tension of water than the corresponding traditional surfactants in the form of sodium salts, being useful for applications related to their aggregation capacity. They were tested for surfactant enhanced oil recovery and an optimal formulation for reservoirs at high salinity and temperature, able to produce ultra‐low interfacial tension, was found with [HOPro][DBS]
2020-09-30
2020-09-30
2018
journal article
V. Fernández-Stefanuto, R. Corchero, I. Rodríguez-Escontrela, A. Soto, E. Tojo, ChemPhysChem 2018, 19, 2885
http://hdl.handle.net/10347/23327
10.1002/cphc.201800735
1439-7641
eng
https://doi.org/10.1002/cphc.201800735
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2015-68496-P/ES/RECUPERACION MEJORADA DEL PETROLEO MEDIANTE EL USO DE LIQUIDOS IONICOS SURFACTANTES
open access
© 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
Wiley
oai:minerva.usc.es:10347/174572023-07-10T06:16:46Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Exploring the production of bio-energy from wood biomass. Italian case study
González García, Sara
Bacenetti, Jacopo
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
CHP
Environmental sustainability
Forest residues
Life Cycle Assessment-LCA
Poplar
Willow
This is the accepted manuscript of the following article: González-García, S., Bacenetti, J., 2019. Exploring the production of bio-energy from wood biomass. Italian case study. Science of the Total Environment 647, 158–168
The concerns related to the environmental impact related to energy production fromfossil fuel are increasing. In
this context, the substitution of fossil fuel based energy by bio-energy can be an effective solution. In this study,
the production of electricity and heat in Italy in a combined heat and power plant (CHP) based on an Organic
Rankine Cycle (ORC) turbine from wood based biomass both from forest and agricultural activities has been
analysed considering four potential alternative scenarios to the current energy status: biomass from very short
rotation forestry (VSRF) poplar and willow stands as well as residues from natural forests and from traditional
poplar plantations. The evaluation has been performed by applying Life Cycle Assessment (LCA) method and
an attributional cradle-to-gate approach has been followed. The expected savings of greenhouse gases emission
and fossil fuels demand have been quantified, aswell as derived emissions of toxic pollutants and substances responsible
for acidification, eutrophication and photochemical oxidant formation.The results have been also compared
with the conventional Italian scenario considering the current Italian electricity profile and heat
production from natural gas. Among the different scenarios, due to the lower transport distance, the use of biomass
from traditional poplar plantation residues shows the lowest impact. The biomass combustion emissions
are the main hotspot for several evaluated impact categories (e.g., particulatematter formation, human toxicity).
In fact, when the produced bio-energy is compared to the reference system (i.e., electricity produced under the
Italian electric profile) the results do not favor bio-energy systems. The results reported in this study support the
idea that forest residues would be an interesting and potential feedstock for bio-energy purposes although further
research is required specifically with the aim of optimizing biomass supply distances
2018-10-15
2020-07-24
2018-07-24
journal article
González-García, S., Bacenetti, J., 2019. Exploring the production of bio-energy from wood biomass. Italian case study. Science of the Total Environment 647, 158–168
0048-9697
http://hdl.handle.net/10347/17457
10.1016/j.scitotenv.2018.07.295
eng
https://doi.org/10.1016/j.scitotenv.2018.07.295
info:eu-repo/grantAgreement/EC/H2020/727740
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2014-14984/ES/
https://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2018 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Elsevier
oai:minerva.usc.es:10347/310162024-02-23T07:40:47Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
How efficiently does a metabolically enhanced system with denitrifying anaerobic methane oxidizing microorganisms remove antibiotics?
Quiton-Tapia, Silvana
Balboa Méndez, Sabela
Omil Prieto, Francisco
Garrido Fernández, Juan Manuel
Suárez Martínez, Sonia
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Organic micropollutants
N-Damo bacteria
Specific biomass activity
Anoxic conditions
Removal of antibiotics
In this work, the novel N-damo (Nitrite dependent anaerobic methane oxidation) process was investigated at high biomass activities for its potential to remove simultaneously nitrite and methane, as well as selected antibiotics commonly found in sewage in trace amounts. For this purpose, two MBRs were operated at three high nitrite loading rates (NLRs), namely 76 ± 9.9, 161.5 ± 11.4 and 215.2 ± 24.2 mg N–NO⁻2 L−1 d−1, at long-term operation. The MBRs performance achieved a significantly high nitrite removal activity for an N-damo process (specific denitrifying activity of up to 540 mg N–NO⁻2 g−1 VSS d−1), even comparable to heterotrophic denitrification values. In this study, we have implemented a novel operational strategy that sets our work apart from previous studies with similar bioreactors. Specifically, we have introduced Cerium as a trace element in the feeding medium, which serves as a key differentiating factor. It allowed maintaining a stable reactor operation at high NLRs. Microbial community composition evidenced that both MBRs were dominated with N-damo bacteria (67–87% relative abundance in period III and I, respectively). However, a decrease in functional N-damo bacteria (Candidatus Methylomirabilis) abundance was observed during the increase in biomass activity and concentration, concomitantly with an increase of the other minor families (Hypomicrobiaceae and Xanthobacteraceae). Most of the selected antibiotics showed high biotransformation such as sulfamethoxazole, trimethoprim, cefalexin and azithromycin, whereas others such as roxithromycin and clarithromycin were only partially degraded (20–35%). On the contrary, ciprofloxacin showed almost no removal. Despite the metabolic enhancement, no apparent increase on the antibiotic removal was observed throughout the operation, suggesting that microbiological composition was of greater influence than its primary metabolic activity on the removal of antibiotics
2023-10-10
2023-10-10
2023-06-21
journal article
Environmental Pollution, 334 (2023) 122033
0269-7491
http://hdl.handle.net/10347/31016
10.1016/j.envpol.2023.122033
eng
https://doi.org/10.1016/j.envpol.2023.122033
info:eu-repo/grantAgreement/EC/H2020/812880/EU
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-110346RB-C21/ES/ANALISIS DE LA RESISTENCIA A ANTIBIOTICOS Y SU BIOTRANSFORMACION EN PLANTAS INNOVADORAS QUE PROMUEVEN LA RECUPERACION DE CARBONO LINEA DE AGUAS
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/251102023-07-10T06:21:42Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Heterotrophic enzymatic biotransformations of organic micropollutants in activated sludge
Kennes Veiga, David Manuel
Vogler, Bernadette
Fenner, Kathrin
Carballa Arcos, Marta
Lema Rodicio, Juan Manuel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Cometabolism
Enzymes
Heterotrophs
Pharmaceuticals
Transformation products
Wastewater
While heterotrophic microorganisms constitute the major fraction of activated sludge biomass, the role of heterotrophs in the biotransformation of organic micropollutants (OMPs) has not been fully elucidated. Yet, such knowledge is essential, particularly when conceiving novel wastewater treatment plants based on a two-stage process including an A-stage under heterotrophic conditions and a B-stage based on anammox activity. Biotransformation of OMPs in activated sludge is thought to mostly occur cometabolically thanks to the action of low specificity enzymes involved in the metabolism of the primary substrates. For a better understanding of the process, it is important to determine such enzymatic activities and the underlying mechanisms involved in OMPs biotransformation. This task has proven to be difficult due to the lack of information about the enzymatic processes and the complexity of the biological systems present in activated sludge. In this paper, a continuous aerobic heterotrophic reactor following 20 OMPs at environmental concentrations was operated to (i) assess the potential of heterotrophs during the cometabolic biotransformation of OMPs, (ii) identify biotransformation reactions catalyzed by aerobic heterotrophs and (iii) predict possible heterotrophic enzymatic activities responsible for such biotransformations. Contradicting previous reports on the dominant role of nitrifiers in OMPs removal during activated sludge treatment, the heterotrophic population proved its capacity to biotransform the OMPs to extents equivalent to reported values in nitrifying activated sludge plants. Besides, 12 transformation products potentially formed through the activity of several enzymes present in heterotrophs, including monooxygenases, dioxygenases, hydrolases and transferases, were identified
2021-03-29
2023-03-18
2021
journal article
Science of The Total Environment, 780 (2021), 146564. https://doi.org/10.1016/j.scitotenv.2021.146564 Copyright
0048-9697
http://hdl.handle.net/10347/25110
10.1016/j.scitotenv.2021.146564
eng
https://doi.org/10.1016/j.scitotenv.2021.146564
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2016-80847-R/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2021 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/291442023-07-10T06:11:30Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Technological feasibility and environmental assessment of polylactic acid-nisin-based active packaging
Arias Calvo, Ana
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Active packaging
Functional film
PLA-nisin
Life cycle assessment
The new consumption patterns based on the “use and throw away” trend has led to an increase in the production of petroleum-based plastics for their application as food packaging films, leading to significant environmental impacts. In the search for alternatives to conventional plastics, polylactic acid (PLA) stands out due to its renewable origin, its mechanical properties and its biodegradability potential. In this regard, this manuscript addresses the large-scale simulation of a bio-technological process for the valorization of wheat straw residues for the co-production of nisin and lactic acid through a batch-type fermentation process. Subsequently, lactic acid will be used for the production of PLA films, to which nisin will be applied to convert them into functional antimicrobial films. To assess the degree of environmental impacts and sustainability of this biotechnological process, Life Cycle Assessment, considering a cradle-to-gate approach, and Greenness Grid methodologies have been applied. The environmental profiles obtained showed that the pre-treatment and downstream stages are the ones leading to the highest impact, being the energy requirements the main hot spots. Moreover, seeking an environmental communication perspective, useful for researchers and stakeholders, the Green Index indicator value obtained leads to the consideration of a potentially sustainable process
2022-08-25
2022-08-25
2022
journal article
Sustainable Materials and Technologies 33 (2022) e00460
http://hdl.handle.net/10347/29144
10.1016/j.susmat.2022.e00460
2214-9937
eng
https://doi.org/10.1016/j.susmat.2022.e00460
info:eu-repo/grantAgreement/EC/H2020/79057
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/262962023-07-10T06:21:44Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Salinity is the major driver of the global eukaryotic community structure in fish-canning wastewater treatment plants
Correa Galeote, David
Roibás Rozas, Alba
Mosquera Corral, Anuska
Juárez Jiménez, Belén
González López, Jesús
Rodelas González, Belén
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Eukarya community
Eukaryotic diversity
NaCl concentration
Fish-canning WWTP
Illumina sequencing
Fish-canning wastewater is characterized frequently by a high content of salt (NaCl), making its treatment particularly difficult; however, the knowledge of the effect of NaCl on eukaryotic communities is very limited. In the present study, the global diversity of eukaryotes in activated sludges (AS) from 4 different wastewater treatment plants (WWTPs) treating fish-canning effluents varying in salinity (0.47, 1.36, 1.72 and 12.76 g NaCl/L) was determined by sequencing partial 18S rRNA genes using Illumina MiSeq. A greater diversity than previously reported was observed in the AS community, which comprised 37 and 330 phylum-like and genera-like groups, respectively. In this sense, the more abundant genus-like groups (average relative abundance (RA) > 5%) were Adineta (6.80%), Lecane (16.80%), Dictyostelium (7.36%), Unclassified_Fungi7 (6.94%), Procryptobia (5.13) and Oocystis (5.07%). The eukaryotic communities shared a common core of 25 phylum-like clades (95% of total sequences); therefore, a narrow selection of the eukaryotic populations was found, despite the differences in the abiotic characteristics of fish-canning effluents and reactor operational conditions inflicted. The differences in NaCl concentration were the main factor that influenced the structure of the eukaryotic community, modulating the RAs of the different phylum-like clades of the common core. Higher levels of salt increased the RAs of Ascomycota, Chlorophyta, Choanoflagellata, Cryptophyta, Mollusca, Nematoda, Other Protists and Unclassified Fungi. Among the different eukaryotic genera here found, the RA of Oocystis (Chlorophyta) was intimately correlated to increasing NaCl concentrations and it is proposed as a bioindicator of the global eukaryotic community of fish-canning WWTPs.
2021-05-25
2023-04-23
2021
journal article
Journal of Environmental Management, 290 (2021), 112623
0301-4797
http://hdl.handle.net/10347/26296
10.1016/j.jenvman.2021.112623
eng
https://doi.org/10.1016/j.jenvman.2021.112623
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO%2FRECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-83225-C2-2-R/ES/RELACION ENTRE LA DIVERSIDAD DE COMUNIDADES MICROBIANAS Y LA EFICIENCIA DEL TRATAMIENTO DEL AGUA RESIDUAL DE LA INDUSTRIA CONSERVERA CON ALTA SALINIDAD Y A BAJAS TEMPERATURAS
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2021 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/329332024-03-21T09:21:41Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
A circular economy strategy for valorizing industrial saline wastewaters: Techno-economics and environmental impacts
Roibás Rozas, Alba
Saavedra del Oso, Mateo
Posada, John Alexander
Mosquera Corral, Anuska
Hospido Quintana, Almudena
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Life cycle assessment, mixed microbial cultures
Polyhydroxyalkanoates
Salinity
Triacylglycerides
Wastewater treatment
Mussels cooking wastewater (MCW) and fish processing wastewater (FPW) were utilized as feedstocks for the production of polyhydroxyalkanoates (PHA) and triacylglycerides (TAG) at the laboratory scale. This study presents a comparison of the techno-economic and environmental performance of ten circular economy-based and innovative processes, in which PHA/TAG are produced using Mixed Microbial Cultures (MMC), with benchmark wastewater treatments for MCW and FPW. The innovative systems were modeled based on the upscaling of lab-scale data using mass balances, and a centralized downstream processing (DSP) plant was proposed for PHA/TAG extraction. This study is the first to conduct a techno-economic and environmental analysis of a system with a centralized DSP. Consequently, the most favorable operational options were selected based on the techno economic and environmental performance of the ten proposed scenarios. The techno economic evaluations demonstrate that treatment costs for MCW and FPW could be reduced by 10% and 40%, respectively, compared to the benchmark treatment. Furthermore, environmental impacts could be significantly reduced (e.g., 10–70% for global warming potential) compared to the baseline scenario by implementing a system expansion approach. Regarding the centralized DSP, the production cost of PHA from MCW falls within a competitive market threshold, ranging from 0.95 to 1.18 €/kg. However, the production costs of PHA and TAG from FPW (1.40–2.21 €/kg PHA and 0.51–0.69 €/kg TAG) are hindered by the lower biomass concentration achieved. Hence, this study demonstrates, for the first time, the potential feasibility of circular economy-based strategies for valorizing saline industrial wastewaters through a centralized DSP approach
2024-02-27
2024-02-27
2023
journal article
Chemical Engineering Journal, Volume 472, 2023, 144819
1385-8947
http://hdl.handle.net/10347/32933
10.1016/j.cej.2023.144819
eng
https://doi.org/10.1016/j.cej.2023.144819
http://creativecommons.org/licenses/by-nc/4.0/
open access
© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/bync/4.0/)
Atribución-NoComercial 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/278752022-11-15T11:48:38Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Sustainable non-isocyanate polyurethanes bio-adhesives for engineered wood panels are revealed as promising candidates to move from formaldehyde-based alternatives
Arias Calvo, Ana
Entrena-Barbero, Eduardo
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Lignocellulosic waste streams valorization
Bio-adhesives
Life Cycle Assessment
Wood bio-adhesives
Agro-industrial streams valorization
The main driving forces on the development of eco-friendly wood adhesives are based on environmental sustainability, costs savings, recyclability, reusability and health benefits, in comparison with synthetic resins. Lignin, tannin, proteins and carbohydrates are the main renewable raw materials being studied. Taking as a premise the technical performance of different bio-based alternatives, in comparison with formaldehyde-based resins, it is necessary to evaluate the environmental profile of such products in order to assess the pros and cons. In this regard, this manuscript addresses the industrial-scale design and environmental evaluation, through the Life Cycle Assessment methodology, of four formaldehyde-free bio-adhesives. For this purpose, the use of renewable resources such as Organosolv (OSL) and kraft (KL) lignins, soy (SPI) and tannins (MT)), crosslinked and hardened with NIPU (non-isocyanate polyurethanes) were considered. The impact results obtained showed that OSL-NIPU bio-adhesive, with a single environmental score of 35.27 mPa, has the best environmental profile, followed by SPI-NIPU, with a value of 63.36 mPa. Therefore, both could be considered as potential substitutes for synthetic resins. On the other hand, it has been identified that hexamethylenediamine (HDMA), used as crosslinking agent for the formulation of the bio-adhesives, is one of the main hotspots of the environmental profiles of OSL, KL and MT NIPU bio-adhesives. In the case of SPI-NIPU adhesives, it is the soy protein isolation process that leads to a higher environmental contribution. Thus, future research should focus on trying to reduce the dose of HMDA and on improving the soy protein isolation process
2022-04-01
2022-04-01
2022
journal article
Journal of Environmental Chemical Engineering 10 (2022) 107053. https://doi.org/10.1016/j.jece.2021.107053
http://hdl.handle.net/10347/27875
10.1016/j.jece.2021.107053
2213-3437
eng
https://doi.org/10.1016/j.jece.2021.107053
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Elsevier
oai:minerva.usc.es:10347/276692023-07-10T06:11:32Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
How decentralized treatment can contribute to the symbiosis between environmental protection and resource recovery
Estévez Rivadulla, Sofía
González García, Sara
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Decentralized wastewater treatment systems
Life Cycle Assessment (LCA)
Environmental Life Cycle Costing (ELCC)
Mineral fertilizers
Biofertilizers
Urban farming
Challenges associated with the sustainability of the water cycle pose new opportunities for resource recovery and greater environmental protection. While centralized wastewater treatment plants must evolve in their design and operation to adapt to a scenario of increasing demand for water, resources and energy, the decentralized approach emerges as an option to be considered in small communities or developing residential areas where bioenergy production can be improved through the recovery of organic matter in segregated streams or where the investment in the sewer network for connection to a centralized facility may be technologically or economically unfeasible. The main objective of this work is to evaluate the environmental and economic profile of a hybrid-decentralized configuration for the purpose of efficient wastewater management and resource recovery and its comparative evaluation with the centralized treatment scenario. Beyond water reclamation, decentralized treatment offers the possibility of valorization of digestate streams as nutrient sources for horticultural or ornamental crops in the vicinity of the plant. Based on the results of the environmental profile, this manuscript shows that the decentralized treatment approach is in line with the philosophy and guidelines of the circular economy, as it allows the use of reclaimed water and biofertilizers under safe and environmental-friendly conditions
2022-03-16
2022-03-16
2022
journal article
Science of The Total Environment 812 (2022) 151485. https://doi.org/10.1016/j.scitotenv.2021.151485
http://hdl.handle.net/10347/27669
10.1016/j.scitotenv.2021.151485
0048-9697
eng
https://doi.org/10.1016/j.scitotenv.2021.151485
info:eu-repo/grantAgreement/EC/H2020/730285-1
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Elsevier
oai:minerva.usc.es:10347/174592023-07-10T06:16:41Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Environmental Life Cycle Assessment of industrial pine roundwood production in Brazilian forests
Salles Ferro, Fabiane
Lopes Silva, Diogo Aparecido
Hideyoshi Icimoto, Felipe
Rocco Lahr, Antonio
González García, Sara
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Brazil
Environmental profile
LCA
Forest system
Pinus oocarpa
This is the accepted manuscript of the following article: Salles Ferro et al., 2018. Environmental Life Cycle Assessment of industrial pine roundwood production in Brazilian forests. Science of the Total Environment 640-641, 599-608
Pine (Pinus oocarpa) wood has great economic importance in Brazil. Pine stands represent the second largest
reforested area in the country due to their industrial interest. Combining the relevance of industrial pine stands in
the country and corresponding environmental concerns, this current study aims to identify and quantify the environmental
impacts derived from industrial pine roundwood production in Brazil. The environmental study was developed
considering the Life Cycle Assessment (LCA) methodology according to ISO14040 framework. The study
convers the life cycle of pine roundwood production from cradle-to-forest gate perspective and considers the current
practices in the country. The production system was divided in five main stages: Soil preparation, seedlings
plantation, forest management, forest harvesting and infrastructure establishment. The environmental profile was
estimated considering characterization factors from the ReCiPe method, in terms of twelve impact categories. According
to the results, forest harvesting stagewas identified as the environmental hotspot being themain responsible
of contributions to nine impact categories under assessment with contributing ratios ranging from 21%
(e.g., freshwater eutrophication) to 76% (e.g., photochemical oxidants formation). The high amount of fossil fuel required
by heavy machinery used in the activities involved in this stage is behind this result. Soil preparation stage
reported also an outstanding contribution in categories such as freshwater eutrophication (37%) and toxicity related
categories (≈35%). The rationale behind these contributions is associated with the use of chemical fertilizers,mostly
superphosphate. The identification of the environmental hotspots in forest biomass production can assist the
Brazilian forest practitioners to improve the environmental profile bymeans of the optimization of forest practices.
2018-10-15
2020-05-22
2018-05-22
journal article
Salles Ferro et al., 2018. Environmental Life Cycle Assessment of industrial pine roundwood production in Brazilian forests. Science of the Total Environment 640-641, 599-608
0048-9697
http://hdl.handle.net/10347/17459
10.1016/j.scitotenv.2018.05.262
eng
https://doi.org/10.1016/j.scitotenv.2018.05.262
info:eu-repo/grantAgreement/EC/H2020/727740
https://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2018 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Elsevier
oai:minerva.usc.es:10347/123052022-11-15T12:45:27Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Estudio del mojado y caracterización superficial por microscopía de barrido laser confocal de chapas de madera obtenidas por desenrollo
Vázquez Uña, Gonzalo
Galiñanes Bello, Cristina
Freire Leira, María Sonia
Antorrena Álvarez, Gervasio
González Álvarez, Julia
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Chapas de madera de desenrollo
Mojado
Ángulo de contacto
Energía libre superficial
Microscopía de barrido láser confocal
Rugosidad
Rotary-peeled veneers
Wettability
Contact angle
Surface free energy
Confocal laser scanning microscopy
Roughness
[ES]El objetivo de este trabajo fue estudiar las propiedades superficiales de chapas obtenidas por desenrollo de cinco especies de maderas duras: okume, ayous, chopo, fromager y eucalipto, y comparar el comportamiento de ambas caras de las chapas. Se han determinado los ángulos de contacto de equilibrio y se ha determinado la energía libre superficial de la madera así como sus componentes polar y dispersa. Asimismo, mediante microscopía de barrido láser confocal se ha evaluado la rugosidad superficial. La energía libre superficial osciló entre 49-64 mJ/m2 y disminuyó en el orden okume > fromager > chopo> ayous ~ eucalipto, lo que indica un descenso de la capacidad de mojado en ese orden. El okume con el mayor valor de la energía libre superficial y los menores valores del ángulo de contacto de equilibrio
se confirmó como la especie con las mejores propiedades de mojado, siendo además la que presentó los mayores valores de los parámetros de rugosidad superficial. Comparando las propiedades superficiales
para las dos caras de las chapas se encontró que dependieron de la especie, pero en general, con la excepción de la rugosidad, las diferencias no fueron muy significativas siendo los mayores cambios para las chapas de okume que presentaron un mejor mojado en su cara interior.
[EN]The aim of this work was to study the surface properties of rotary-peeled veneers of five species of hardwoods: okume, ayous, poplar, fromager and eucalyptus and to compare the behavior of both sides of the veneers. The equilibrium contact angles were determined together with the wood surface free energy and its polar and disperse components. Additionally, surface roughness was evaluated using confocal laser scanning microscopy. Surface free energy ranged from 49-64 mJ/m2 and decreased in the order okume> fromager> poplar> eucalyptus ~ ayous, indicating a decrease in wettability in that order.
Okume wood with the highest value of the surface free energy and the lowest values of the equilibrium contact angle was confirmed as the species with the best wetting properties, and also presented the highest
values of surface roughness parameters. In general, there were not significant differences between the properties of both sides of the veneers, except for roughness. The largest differences were obtained for okume veneers whose interior side showed higher wettability.
2015-02-13
2015-02-13
2011
journal article
Vázquez, G., Galiñanes, C., Freire, M.S., Antorrena, G., González-Alvarez, J. (2011). Estudio del mojado y caracterización superficial por microscopía de barrido laser confocal de chapas de madera obtenidas por desenrollo. "Maderas: Ciencia y Tecnología", 13 (2), pp. 183-192.
0717-3644
E-ISSN 0718-221X
http://hdl.handle.net/10347/12305
10.4067/S0718-221X2011000200006
spa
http://dx.doi.org/10.4067/S0718-221X2011000200006
open access
Universidad del Bío-Bío
oai:minerva.usc.es:10347/290432023-07-10T06:11:30Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Exploring the potential of antioxidants from fruits and vegetables and strategies for their recovery
Arias Calvo, Ana
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Natural antioxidants
Food science
Vitamins
Flavonoids
Fruits and vegetables
Green extraction technologies
A balanced and nutritious diet is the cornerstone of good health. The nutritional pyramid advises eating 5 servings of fruit and vegetables a day as a basic principle of a healthy diet, as they provide essential nutrients such as vitamins and minerals, as well as fiber and antioxidants. Consuming them in adequate quantities improves the immune system and helps prevent diseases such as diabetes, obesity, heart disease and even certain types of cancer. Among the most nutrient-dense nutrients in fruit and vegetables are antioxidants. This is the context for this review, in which an exhaustive analysis has been carried out of the bioactive compounds with antioxidant capacity available in the most widely produced fruit and vegetables in Spain, considering not only the studies that identify these types of compounds, but also those that analyze their effects on human health. Furthermore, it is worth highlighting the interest of the extraction of antioxidant compounds in by-product streams from fruit and vegetable processing in the context of the circular economy. Therefore, this review also includes examples of green technologies for the extraction of antioxidants from waste fractions. In this field, microwave and ultrasound-assisted extraction technologies have been found to be the most efficient, both in terms of extraction yields, which are similar to those of conventional technologies, and in terms of the operating conditions required for the process. However, enzyme cocktails or pulsed electric fields also show promising results
2022-08-10
2022-08-10
2022
journal article
Innovative Food Science & Emerging Technologies 77 (2022) 102974
http://hdl.handle.net/10347/29043
10.1016/j.ifset.2022.102974
1466-8564
eng
https://doi.org/10.1016/j.ifset.2022.102974
info:eu-repo/grantAgreement/EC/H2020/79057
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/230612022-11-15T11:58:38Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
What is the best scale for implementing anaerobic digestion according to environmental and economic indicators?
Arias Cisterna, Andrea
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Anaerobic digestion (AD)
Economic analysis (EA)
Eco-efficiency
Energy production
Life cycle assessment (LCA)
Scale-up analysis
Wastewater treatment plants (WWTPs) are the most commonly used environmental management systems to ensure that water pollution is properly managed. The costs associated with energy consumption and sludge management are two elements that penalize the operation of WWTPs. Anaerobic digestion (AD) unit showed to be a good alternative that allows the valorization of the organic load into bioenergy. However, not all WWTPs incorporate this technology in the sludge line that is associated with a minimum scale plant in order to ensure steady and profitable operation of the unit. With the decentralized context taking more strength one question arises: Is the AD technology viable in smaller plants?
In this study four different sludge lines with different plant sizes were evaluated from an environmental and economic point of view. The sludge lines range between 25,000–1,000,0000 of equivalent inhabitants and the main difference between them is that small WWTP has no AD unit. According to the results, environmental impacts of the AD technology do not depend directly on the size of the plant. It is for this reason that not only medium and large plants bring environmental and economic benefits, but also smaller ones, as long as the necessary premise of biogas valorization into bioenergy is met. AD technology can be improved with the addition of agrowaste that can enhance the organic load in the anaerobic digestor and improve the yield of biogas production and the eco-efficiency, in such a way that the premises of technological, economic and environmental viability are fulfilled
2020-06-25
2022-03-19
2020
journal article
Journal of Water Process Engineering. Volume 35, June 2020, 101235. doi: https://doi.org/10.1016/j.jwpe.2020.101235
2214-7144
http://hdl.handle.net/10347/23061
10.1016/j.jwpe.2020.101235
eng
https://doi.org/10.1016/j.jwpe.2020.101235
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/266732021-08-04T02:02:24Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
How should ecohazard of micropollutants in wastewater be gauged? Using bioassays to profile alternative tertiary treatments
Papa, Matteo
Paredes Barro, Lidia
Feretti, Donatella
Viola, Gaia Claudia Viviana
Mazzoleni, Giovanna
Steimberg, Nathalie
Pedrazzani, Roberta
Lema Rodicio, Juan Manuel
Omil Prieto, Francisco
Carballa Arcos, Marta
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Estrogenicity
Granular activated carbon
Mutagenicity
Organic micropollutants
Sand filtration
UV irradiation
The research on emerging pollutants in wastewater has become a worldwide issue of increasing environmental concern, especially considering the growing interest in wastewater reuse. However, the latter implies additional post-treatment after the conventional activated sludge processes, in order to produce a safer effluent. Our work aimed at determining the efficiency of reducing the toxicity associated with organic micropollutants (OMPs) in secondary wastewater effluents, using 3 different post-treatment technologies (granular activated carbon (GAC), sand biofiltration and UV irradiation): in particular, target chemical analysis of the OMPs most commonly founded in wastewater was coupled with effect-based assays (estrogenicity and mutagenicity). While chemical analysis assessed satisfactory performances for all 3 technologies in the abatement of selected OMPs, biological assays evidenced another perspective: both GAC and sand biofilters were significantly able to make the estrogenic load plummet; however, the UV system was ineffective in estrogenicity abatement, and its effluent exhibited also a slight mutagenicity, likely due to photo-transformation by-products. These results indicate that a synergistic combination of chemical analysis and biological assays can drive to a proper gauging of post-treatment technologies, taking into account not only the removal of OMPs, but also their overall toxicity
2021-08-03
2021-08-03
2021
journal article
Environmental Engineering Research 2021; 26(3): 200153. https://doi.org/10.4491/eer.2020.153
1226-1025
http://hdl.handle.net/10347/26673
10.4491/eer.2020.153
2005-968X
eng
https://doi.org/10.4491/eer.2020.153
http://creativecommons.org/licenses/by-nc/3.0/
open access
© 2021 Korean Society of Environmental Engineers (open-access): This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited
Korean Society of Environmental Engineers
oai:minerva.usc.es:10347/251492023-07-10T06:16:29Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Potential of endogenous PHA as electron donor for denitrification
Santorio Aldariz, Sergio
Fra Vázquez, Andrea
Val del Río, María Ángeles
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Activity test
Denitrification
Polyhydroxyalkanoates
Specific endogenous denitrifying activity
The use of wastewater streams to obtain polyhydroxyalkanoates (PHA) as high added-value products is widely studied. However, nitrogen removal is not well integrated into this process. In this study, the optimal conditions to track the specific endogenous denitrifying activity (SEDA) driven by PHA as carbon source were selected as: sludge concentration of 0.5–2 g VSS/L, CODPHA/N ratio higher than 5.4 g/g and between 40 and 60 mg NO3−-N/L. The seeding biomass used to perform the activity tests was collected from two sequencing batch reactors and was able to store up to 69% wt/wt of PHA. SEDA values of 0.26–0.39 g N2-N/(g VSSact d) were achieved, which proved the potential of PHA-accumulating mixed microbial cultures to be used in nitrogen removal processes. The results indicated that there is not a preference in the consumption of hydroxybutyrate over hydroxyvalerate and that PHA concentrations lower than 5% wt/wt do not allow the obtainment of the maximum SEDA value. Finally, N2O gas production was not detected in the SEDA experiments
2021-03-30
2021-08-02
2019
journal article
Science of The Total Environment, 695 (2019), 133747. https://doi.org/10.1016/j.scitotenv.2019.133747
0048-9697
http://hdl.handle.net/10347/25149
10.1016/j.scitotenv.2019.133747
eng
https://doi.org/10.1016/j.scitotenv.2019.133747
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO/RECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/290822023-07-10T06:11:36Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Environmental synergies in decentralized wastewater treatment at a hotel resort
Estévez Rivadulla, Sofía
Moreira Vilar, María Teresa
Feijoo Costa, Gumersindo
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Decentralized wastewater treatment systems
Life cycle assessment (LCA)
Fertigation
Water reclamation
Climate change and water scarcity are clearly related environmental problems, making them global environmental issues. Accordingly, the water cycle management deserves a revision in its approach, integrating the concept of circular economy within an efficient and sustainable management of water resources and the design of wastewater facilities. In this sense, newly engineered decentralized facilities have emerged as a viable option for the treatment of segregated wastewater flows. The design has not only integrated the wastewater treatment function, but also resource recovery, such as water reclamation for agricultural and irrigation activities, fertigation, fertilization and energy sustainability. Based on these premises, the concept of decentralized wastewater management deserves the same degree of attention and development that has so far been reserved for conventional centralized management systems. Therefore, this paper proposes a progressive substitution of the business-as-usual scenario or centralized system by applying a small-scale wastewater management scheme performing a more efficient resource and water recovery in a medium-sized 4–5-star resort hotel. The spotlight was a membrane technology for the anaerobic digestion of the blackwater instead of the greywater treatment. A favorable environmental profile was found for the decentralized scenario under two circumstances: a large system boundary including the beneficial environmental impacts of the products and, based on the results obtained from a sensitivity analysis, an energy demand for the operation of the AnMBR lower than 2 kWh·m−3. The global warming potential results (around 9%) were even for such high demand and much larger benefits were obtained for other impact categories (94% for SOD and 98% for LU). Nevertheless, the operation (gate-to-gate approach) of these on-site recovery facilities is far from being optimized and further research should follow to decrease the 39.8% difference in the global warming potential between decentralized and centralized systems
2022-08-18
2022-08-18
2022
journal article
Journal of Environmental Management 317 (2022) 115392
http://hdl.handle.net/10347/29082
10.1016/j.jenvman.2022.115392
0301-4797
eng
https://doi.org/10.1016/j.jenvman.2022.115392
info:eu-repo/grantAgreement/EC/H2020/GA730285-1
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PRE2020-092074/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/250992023-07-10T06:21:41Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Feeding composition and sludge retention time both affect (co-)metabolic biotransformation of pharmaceutical compounds in activated sludge systems
González Gil, Lorena
Fernández Fontaiña, Eduardo
Singh, Randolph
Lema Rodicio, Juan Manuel
Carballa Arcos, Marta
Aga, Diana
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Biodegradation
Heterotrophs
Cometabolism
Nitrifiers
Organic micropollutants
Wastewater treatment plant
The role of heterotrophic and nitrifying microorganisms in the (co-)metabolic biotransformation of 10 pharmaceutically active compounds (PhACs) was investigated. To this aim, biotransformation assays were performed with heterotrophic and nitrifying sludge developed separately in a two-stage full-scale activated sludge system. Each stage was operated at different inflow wastewater characteristics and sludge retention times (on average 8 d and 35 d). The biotransformation capacity of each sludge was evaluated in the absence of primary substrate and in the presence of acetate and ammonium, to independently elucidate the co-metabolic role of heterotrophs and nitrifiers present in both sludges. Trimethoprim, diclofenac and carbamazepine were recalcitrant (removal < 5% after 1 d; biotransformation rate < 50 µg/g VSS·d) under all the tested conditions. High concentrations of caffeine, acetaminophen and iopromide were quickly biotransformed (> 80% after 1 d; > 800 µg/g VSS·d) in the absence of primary substrates. The heterotrophic sludge only showed a co-metabolic effect towards erythromycin, which increased its biotransformation rate between 43% and 53% when acetate and ammonium were supplied. In contrast, when stimulated, nitrifiers and slow-growing heterotrophs present in the nitrifying sludge co-metabolically biotransformed acetaminophen, ibuprofen and naproxen to a significant extent. Sulfamethoxazole was recalcitrant, except when the nitrifying sludge was fed with acetate (> 800 µg/g VSS·d), suggesting that slow-growing heterotrophs co-metabolically biotransformed it. This study provides evidence that biotransformation of PhACs depends on several metabolic activities, as the heterotrophic activity of the nitrifying sludge, which are not only determined by the SRT but also by the feeding composition
2021-03-29
2023-01-22
2021
journal article
Journal of Environmental Chemical Engineering, 9 (2021), 105123. https://doi.org/10.1016/j.jece.2021.105123
2213-3437
http://hdl.handle.net/10347/25099
10.1016/j.jece.2021.105123
eng
https://doi.org/10.1016/j.jece.2021.105123
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2016-80847-R/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2021 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/244212023-07-10T06:12:44Zcom_10347_15716com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888com_10347_2924com_10347_2891col_10347_15717col_10347_20715col_10347_12262col_10347_12284
Nanomaterial Synthesis in Ionic Liquids and Their Use on the Photocatalytic Degradation of Emerging Pollutants
Corchero Morais, Raquel
Rodil Rodríguez, María del Rosario
Soto Campos, Ana María
Rodil Rodríguez, Eva
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Departamento de Química Analítica, Nutrición e Bromatoloxía
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Ionic liquids
Nanocatalyst
Atenolol
Kinetics
Degradation pathways
The unique properties of ionic liquids make them suitable candidates to prepare nanoscale materials. A simple method that uses exclusively a corresponding bulk material and an ionic liquid—in this case, [P6,6,6,14]Cl—was used to prepare AgCl nanoparticles and AgCl@Fe3O4 or TiO2@Fe3O4 magnetic nanocomposites. The prepared nanomaterials were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet–visible spectroscopy, and X-ray photoelectron spectroscopy. The photodegradation of atenolol as a model pharmaceutical pollutant in wastewater was investigated under ultraviolet–visible light irradiation using the different synthesized nanocatalysts. In the presence of 0.75 g·L−1 AgCl nanoparticles, a practically complete degradation of 10 ppm of atenolol was obtained after 30 min, following pseudo-first-order reaction kinetics. The effect of different variables (concentrations, pH, oxidant agents, etc.) was analyzed. The recyclability of the nanocatalyst was tested and found to be successful. A degradation mechanism was also proposed. In order to improve the recovery stage of the nanocatalyst, the use of magnetic nanocomposites is proposed. Under the same experimental conditions, a slightly lower and slower degradation was achieved with an easier separation. The main conclusions of the paper are the suitability of the use of ionic liquids to prepare different nanocatalysts and the effectiveness of these at degrading an emerging pollutant in wastewater treatment
2021-02-12
2021-02-12
2021
journal article
Nanomaterials 2021, 11(2), 411; https://doi.org/10.3390/nano11020411
http://hdl.handle.net/10347/24421
10.3390/nano11020411
2079-4991
eng
https://doi.org/10.3390/nano11020411
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM2017-84763-C3-2-R/ES/EVALUACION DEL EXPOSOMA DE CONTAMINANTES EMERGENTES EN AMBIENTES ACUATICOS
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
MDPI
oai:minerva.usc.es:10347/244962022-02-02T02:00:08Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Microbial inefficient substrate use through the perspective of resource allocation models
Regueira López, Alberte
Lema Rodicio, Juan Manuel
Mauricio Iglesias, Miguel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Microorganisms extract energy from substrates following strategies that may seem suboptimal at first glance. Beyond the so-called yield-rate trade-off, resource allocation models, which focus on assigning different functional roles to the limited number of enzymes that a cell can support, offer a framework to interpret the inefficient substrate use by microorganisms. We review here relevant examples of substrate conversions where a significant part of the available energy is not utilised and how resource allocation models offer a mechanistic interpretation thereof, notably for open mixed cultures. Future developments are identified, in particular, the challenge of considering metabolic flexibility towards uncertain environmental changes instead of strict fixed optimality objectives, with the final goal of increasing the prediction capabilities of resource allocation models. Finally, we highlight the relevance of resource allocation to understand and enable a promising biorefinery platform revolving around lactate, which would increase the flexibility of waste-to-chemical biorefinery schemes
2021-02-18
2022-02-02
2021
journal article
Current Opinion in Biotechnology Volume 67, February 2021, Pages 130-140
0958-1669
http://hdl.handle.net/10347/24496
10.1016/j.copbio.2021.01.015
eng
https://doi.org/10.1016/j.copbio.2021.01.015
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2021 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/298822023-01-17T03:02:33Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
A clustering approach to analyse the environmental and energetic impacts of Atlantic recipes - A Galician gastronomy case study
Cambeses Franco, Cristina
González García, Sara
Calvo Malvar, Maria del Mar
Benítez Estévez, Alfonso Javier
Leis Trabazo, María Rosaura
Sánchez Castro, Juan
Gude Sampedro, Francisco
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Recipes
Carbon footprint
Energy efficiency
Cost
Sustainability
Galicia
The definition of the term gastronomy encompasses both the knowledge of food and its handling, preparation and consumption. Beyond a sense of cultural identity and tradition, gastronomy also represents a pole of tourist attraction. This is the case of Galicia, a region in north-western Spain. Within this framework, local dishes, which include distinctive elements of the Atlantic diet, have gained popularity. This research delves into the sustainability of 60 Galician recipes by performing a hierarchical cluster analysis to study their carbon footprint, the energy return on investment ratio and cost. The life cycle assessment methodology was followed to account for the carbon footprint and the energy return on investment ratio of the recipes. The scope was bounded to the cradle-to-fork phases through the life cycle: production of the ingredients, transport, and meal preparation. The functional unit selected was one serving of a Galician meal. The results suggest that the recipes could be classified into three main groups according to the presence of a greater or lesser amount of animal-based products. Cluster 1 comprises 10 meat recipes. Cluster 2 encompasses 31 recipes rich in fish with some vegetables and moderate consumption of red meat and dairy products. Cluster 3 includes 22 vegetable-based recipes. The higher the portion of animal products in the recipes (mainly red meat), the higher the costs and carbon footprint and the lower the energy return on investment ratio. Conversely, plant-based recipes tend to reduce greenhouse gases emissions and increase cost competitiveness and energy efficiency indicators. Based on this study, the food service could promote eco-labelling that support and certify restaurant menus. This research could also provide transformative climate education for sustainable food for consumers, giving advice to improve food-based dietary guidelines in Spain
2023-01-16
2023-01-16
2022
journal article
Journal of Cleaner 383 (2023) 135360
http://hdl.handle.net/10347/29882
10.1016/j.jclepro.2022.135360
0959-6526
eng
https://doi.org/10.1016/j.jclepro.2022.135360
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/291482022-11-15T12:58:49Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Polyphenols extraction kinetics from Ascophyllum nodosum seaweed employing water and saltwater: effect of ultrasound sonication
Gisbert Verdú, Mauro
Sineiro Torres, Jorge
Moreira Martínez, Ramón Felipe
Antioxidant activity
Carbohydrates
Peleg's model
RP-HPLC
Uronic acid
Saltwater (S), with the same ionic strength of seawater, was employed as solvent to extract polyphenols from seaweeds. Aqueous extracts were chemically characterized by means of total polyphenols (TPC), carbohydrates (CHOS) and uronic acids (UA) content and antioxidant capacities (DPPH, ABTS and FRAP). S-extracts showed lower TPC than those obtained with distilled water (D) using two different extraction methods, conventional solid-liquid extraction (SLE) and ultrasound-assisted extraction (UAE). The antioxidant capacities of both non-sonicated extracts did not show significant (p < 0.05) differences. SLE kinetics employing both solvents (D and S) were successfully modelled by Peleg's model, and equilibria were achieved after 15 min. Long-time UAE (15 min) increased phytochemical content in both D- and S-extracts with respect to SLE. Extracts showed three main (A, B, and C) regions from RP-HPLC profiles with different peak areas and shapes. Normalized regions areas from RP-HPLC were related to antioxidant activities by linear regressions and showed that B-region was the main responsible of phytochemical features of the extracts. SLE with saltwater promoted the leaching of other compounds (mainly proteins) that formed intermolecular complexes. These interactions were notoriously diminished with UAE. At these conditions, saltwater can be employed as eco-friendly solvent according to the green chemistry principles
2022-08-25
2022-08-25
2022
journal article
Algal Research 66 (2022) 102773
http://hdl.handle.net/10347/29148
10.1016/j.algal.2022.102773
2211-9264
eng
https://doi.org/10.1016/j.algal.2022.102773
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/273292023-07-10T06:11:01Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888com_10347_2924com_10347_2891col_10347_20715col_10347_12262col_10347_12284
Evaluating the environmental profiles of winter wheat rotation systems under different management strategies
González García, Sara
Almeida García, Fernando
Moreira Vilar, María Teresa
Brandão, Miguel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Departamento de Química Analítica, Nutrición e Bromatoloxía
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Attributional LCA
Bread
Crop rotation
Integrated assessment
Maize
Potato
Oilseed rape
Climate change poses a remarkable challenge to global food security, for which wheat is one of the main staple agricultural commodities. The cultivation of different varieties of winter wheat in Galicia (commercial and native) under rotation systems with potato, maize and oilseed rape was evaluated from an environmental point of view. The general approach of this study included the gathering of the inventory data of the different crops, the quantification of their environmental impacts and economic benefits, to identify the best land management system. Life Cycle Assessment (LCA) was used as environmental tool. The environmental profiles of each rotation system were reported in terms of nine impact categories. Crop rotations were analysed both per hectare and per € of gross margin, so that the information can be relevant to land-management decisions. Preference ranks were established based on an environmental normalized score for both units. The results suggest that arable operations contribute decisively to the environmental profile of the rotations. The avoided mineral fertilization processes, the carbon storage in the soil when returning straw to the field, as well as the electricity production clearly influence the environmental impact of the rotations. Scenarios that include native wheat under organic management are always the environmentally preferred ones while the preferred alternate crop depends on the reference unit. Concerning the margin gross, scenarios including the native variety report the highest profits, being the potato the preferred alternate crop. Further assessment needs to be undertaken to identify differences in the results of different ways of conducting LCA, i.e. attributional vs consequential approaches
2022-01-07
2022-01-07
2021
journal article
Science of The Total Environment 770 (2021) 145270
http://hdl.handle.net/10347/27329
10.1016/j.scitotenv.2021.145270
0048-9697
eng
https://doi.org/10.1016/j.scitotenv.2021.145270
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PCI2020-111978/ES/MEJORA DE LA DIVERSIDAD EN LOS SISTEMAS DE CULTIVO DE CEREALES MEDITERRANEOS
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/166532023-07-10T06:12:35Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Effects of Inoculum Type and Aeration Flowrate on the Performance of Aerobic Granular SBRs
Jungles, Mariele K.
Val del Río, María Ángeles
Mosquera Corral, Anuska
Campos Gómez, José Luis
Méndez Pampín, Ramón José
Costa, Rejane H. R.
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Aeration flowrate
Aerobic granules
Inoculum
Sequencing batch reactor
Wastewater
Aerobic granular sequencing batch reactors (SBRs) are usually inoculated with activated sludge which implies sometimes long start-up periods and high solids concentrations in the effluent due to the initial wash-out of the inoculum. In this work, the use of aerobic mature granules as inoculum in order to improve the start-up period was tested, but no clear differences were observed compared to a reactor inoculated with activated sludge. The effect of the aeration rate on both physical properties of granules and reactor performance was also studied in a stable aerobic granular SBR. The increase of the aeration flow rate caused the decrease of the average diameter of the granules. This fact enhanced the COD and ammonia consumption rates due to the increase of the DO level and the aerobic fraction of the biomass. However, it provoked a loss of the nitrogen removal efficiency due to the worsening of the denitrification capacity as a consequence of a higher aerobic fraction
2018-04-09
2018-04-09
2017-07-19
journal article
Jungles, M.K.; Val del Río, Á.; Mosquera-Corral, A.; Campos, J.L.; Méndez, R.; Costa, R.H.R. Effects of Inoculum Type and Aeration Flowrate on the Performance of Aerobic Granular SBRs. Processes 2017, 5, 41. https://doi.org/10.3390/pr5030041
http://hdl.handle.net/10347/16653
10.3390/pr5030041
2227-9717
eng
https://doi.org/10.3390/pr5030041
info:eu-repo/grantAgreement/MEC/Plan Nacional de I+D+i 2004-2007/CSD2007-00055/ES/Concepción de la EDAR del siglo XXI. Desarrollo, implementación y evaluación de tecnologías para el tratamiento y recuperación de recursos en aguas residuales
https://creativecommons.org/licenses/by/4.0/
open access
© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
MDPI
oai:minerva.usc.es:10347/291662022-11-15T09:49:14Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Blue carbon accounting as metrics to be taken into account towards the target of GHG emissions mitigation in fisheries
Entrena-Barbero, Eduardo
Feijoo Costa, Gumersindo
González García, Sara
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Carbon sequestration
Carbon cycle
Carbon footprint
Dietary patterns
Fishery policies
The adoption of the 2030 Agenda for Sustainable Development must address the balance between sustainable growth and tackling climate change. In this context, forests can help to reduce greenhouse gas (GHG) emissions, unfortunately, equivalent solutions in the ocean are often overlooked. Moreover, the complexity in determining the real impact of fishing on the environment is not a trivial issue. Thus, the aim of this study is to broaden the scope and analyse, for the first time, the entire carbon cycle associated with the life cycle of a fish: Scomber scombrus from a fishery located in the Cantabrian Sea (Spain). From this carbon cycle assessment, it is estimated that fishing activity has prevented 871.7 t of carbon (in terms of blue carbon) from being sequestered each year. This value comes from the fraction of fish that would have died of natural causes if they had not been caught, reaching the seabed, and undergoing remineralisation processes of the carbon content of their bodies. Beyond these results, it is vital to implement a series of actions with the aim of counteracting the amount of carbon that could have been sequestered on the seabed by the natural death of the fishes if they had not been caught. To this end, it is shown that the implementation of technical improvements to the vessels, the replacement of the current fuel used and the rearrangement of shipping routes in combination with an extension in the closed fishing season and a commitment to an omnivorous diet, allows for a reduction in carbon flow of almost 90 % of the blue carbon that has been prevented from being sequestered by fisheries. A consequential approach can then identify the influence of the proposed changes on their corresponding carbon flows for use as decision criteria in regulating fisheries and environmental management policies
2022-08-29
2022-08-29
2022
journal article
Science of The Total Environment 847 (2022) 157558
http://hdl.handle.net/10347/29166
10.1016/j.scitotenv.2022.157558
0048-9697
eng
https://doi.org/10.1016/j.scitotenv.2022.157558
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/251152023-07-10T06:16:27Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
A novel strategy for triacylglycerides and polyhydroxyalkanoates production using waste lipids
Argiz Montes, Lucía
González Cabaleiro, Rebeca
Val del Río, María Ángeles
González López, Jesús
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Biotransformation
Lipidic waste
Mixed microbial culture
pH
Uncoupled feeding
Lipids are one of the main components of the organic matter present in the effluents of the food-processing industry. These waste streams can be biotransformed into valuable triacylglycerides (TAGs) and polyhydroxyalkanoates (PHAs), precursors of biofuels and biomaterials alternative to petroleum-based products. These compounds are yielded by mixed microbial cultures, and considering that both TAG and PHA accumulators may coexist within the community, it seems crucial to define those operational strategies that might control the selection of the dominant metabolic pathways (TAG or PHA accumulation). In this work, residual fish-canning oil was used as a carbon source in a two-stage process (culture selection and intracellular compounds accumulation) in which the substrate was simultaneously hydrolyzed in these two stages without the need for a previous fermentation unit. It was pretended to maximize preferential TAG or PHA storage in the accumulation reactor by the imposition of certain selective pressures in the enrichment one. Uncoupling C and N feedings and limiting nitrogen availability in the medium, allowed to maximize PHA production (82.3 wt% of PHAs, 0.80 CmmolPHA/CmmolS). Besides, when low pH in the famine phase was considered as additional selective pressure, it was possible to shift the ratio TAG:PHA from 4:96 obtaining 43.0 wt% of TAGs (0.67 CmmolTAG/CmmolS). Therefore, this novel and simplified process demonstrated versatility and efficiency in the storage of TAGs and PHAs from a unique residual feedstock and using an open culture proving that product selection can be harnessed if choosing the right operational conditions in the enrichment stage
2021-03-29
2022-10-14
2021
journal article
Science of The Total Environment, 763 (2021), 142944. https://doi.org/10.1016/j.scitotenv.2020.142944
0048-9697
http://hdl.handle.net/10347/25115
10.1016/j.scitotenv.2020.142944
eng
https://doi.org/10.1016/j.scitotenv.2020.142944
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO/RECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/224492023-07-10T06:12:08Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Environmental assessment of viticulture waste valorisation through composting as a biofertilisation strategy for cereal and fruit crops
Cortés Montoya, Antonio José
Oliveira, Luis F.S.
Ferrari, Valdecir
Taffarel, Silvio R.
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Life cycle assessment
Viticulture waste
Composting
Valorisation
Mineral fertilisers
Composting is a solid waste management alternative that avoids the emission of methane associated with its disposal in landfill and reduces or eliminates the need for chemical fertilisers if compost is applied. The main objective of this study was to analyse the environmental burdens of composting as a way to achieve a more circular valorisation of wine waste. To do so, with the purpose of identifying optimal operational conditions and determining the “hotspots” of the process, the life cycle assessment (LCA) methodology was used. The consumption of diesel fuel in machinery was determined to be the main critical point in the environmental effects of the system, followed by the transport and distribution of the compost. After the application of compost instead of mineral fertilisers, corn, tomato and strawberry crops would have a better environmental performance in most impact categories. In this sense, a maximum improvement of 65% in terrestrial ecotoxicity is achieved in strawberry cultivation. In light of the results obtained, it is demonstrated that composting is a suitable way of organic waste valorisation according to Circular Economy principles
2020-05-19
2022-05-12
2020
journal article
Environmental Pollution. Volume 264, September 2020, 114794. DOI: 10.1016/j.envpol.2020.114794
0269-7491
http://hdl.handle.net/10347/22449
10.1016/j.envpol.2020.114794
eng
https://doi.org/10.1016/j.envpol.2020.114794
info:eu-repo/grantAgreement/EC/H2020/727740
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/291552022-08-27T02:02:53Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Enhanced oil recovery with nanofluids based on aluminum oxide and 1-dodecyl-3-methylimidazolium chloride ionic liquid
Al-Asadi, Akram
Arce Arce, Alberto
Rodil Rodríguez, Eva
Soto Campos, Ana María
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Nanoparticles
Ionic liquid
IFT
Adsorption
Wettability
Flooding
Surface-active ionic liquids (SAILs) have multiplied the possibilities of surfactant enhanced oil recovery (EOR) methods. Among their multiple promising features, the possibility of functionalization and their stability at harsh conditions should be highlighted for the application. They have been successfully applied to increase oil recovery by improving crucial parameters such as: formulation stability, reduction of water–oil interfacial tension, and wettability. Recently, nanoparticles have attracted attention for EOR applications due to their capacity to modify the properties of rock surfaces. However, to date no research has been conducted on the combination of SAILs with nanoparticles for EOR. In this work, the combination of the SAIL 1-dodecyl-3-methylimidazolium chloride, [C12mim]Cl, with Al2O3 nanoparticles is proposed for EOR. Stable dispersions in brine were achieved, using the polymer polyvinylpyrrolidone (PVP) as a stabilizing agent, and characterized through density and dynamic viscosity measurements. According to stability and interfacial tension studies, a nanofluid consisting of 0.05 wt% [C12mim]Cl, 0.05 wt% Al2O3 and 1.0 wt% PVP, in brine (5.0 wt% NaCl) was proposed for EOR in carbonate reservoirs. The presence of nanoparticles reduced the adsorption of the surfactant-polymer formulation on carbonate rocks and changed the aged rock wettability from oil-wet to water-wet. An additional oil recovery of 10.4 %OOIP was achieved with the surfactant-polymer formulation, in comparison with 14.8 %OOIP obtained with the nanofluid
2022-08-26
2022-08-26
2022
journal article
Journal of Molecular Liquids 363 (2022) 119798
http://hdl.handle.net/10347/29155
10.1016/j.molliq.2022.119798
0167-7322
eng
https://doi.org/10.1016/j.molliq.2022.119798
http://creativecommons.org/licenses/by-nc/4.0/
open access
©2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC license. (http://creativecommons.org/licenses/by-nc/4.0/)
Atribución-NoComercial 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/225612023-07-10T06:16:02Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Optimization of an enriched mixed culture to increase PHA accumulation using industrial saline complex wastewater as a substrate
Argiz Montes, Lucía
Fra Vázquez, Andrea
Val del Río, María Ángeles
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Bioplastics
Enrichment
Industrial wastewater
Mixed microbial culture
Polyhydroxyalkanoates
Valorization
Polyhydroxyalkanoates (PHA) appear as good candidates to substitute conventional petroleum-based plastics since they have similar properties but with the advantage of being biodegradable. Wastewater streams with high organic content are feasible substrates for PHA production resulting in an opportunity for waste recovery. One of the main challenges is the optimization of the selection of microorganisms with high PHA storage capacity. This microbial selection is performed in sequencing batch reactors (SBR) operated under an aerobic feast/famine (F/F) regime. In the present study, a settling stage was added at the end of the feast phase of the enrichment cycle of a SBR fed with pre-acidified cooked mussel processing wastewater (containing up to 12 g NaCl/L). Settling and subsequent supernatant discharge favoured the wash-out of non-accumulating microorganisms as well as the removal of substances that enhanced their undesired development (proteins and carbohydrates). Microbial analysis performed by fluorescence in situ hybridization (FISH) technique showed shifts in the microbial community; the presence of genus Paracoccus increased whereas genera Comamonas decreased. Moreover, the process efficiency was improved with the increase of the PHA production yield (YPHA) and the maximum PHA storage capacity (max. PHA) from 0.48 to 0.72 CmmolPHA/CmmolVFA and from 40 to 60 wt%, respectively. The polymer composition also changed, its HB:HV ratio varied from 83:17 to 70:30. Results obtained in the present study showed that settling after the feast phase promoted the removal of carbon sources that did not contribute to PHA production and the washout of non-storing bacteria, which favoured the culture enrichment
2020-05-25
2022-01-11
2020
journal article
Chemosphere, Volume 247, May 2020, 125873 Doi: 10.1016/j.chemosphere.2020.125873
0045-6535
http://hdl.handle.net/10347/22561
10.1016/j.chemosphere.2020.125873
eng
https://doi.org/10.1016/j.chemosphere.2020.125873
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO/RECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/250232023-07-10T06:16:26Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Enrichment of nitrite-dependent anaerobic methane oxidizing bacteria in a membrane bioreactor
Allegue Martínez, Tomás Francisco
Fernández González, Nuria
Omil Prieto, Francisco
Garrido Fernández, Juan Manuel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Methanogenic reactors
N-damo bacteria
Dissolved methane
Nitrous oxide
Ammonium and membrane bioreactor
The use of nitrite-dependent anaerobic methane oxidation (n-damo) processes could represent an innovative technology in order to minimize the environmental impact of anaerobic sewage effluents at low temperatures, since these biological processes are able to simultaneously remove nitrite and dissolved methane in anaerobic conditions. Nevertheless, n-damo bacteria are well-known by their reported low activity and slow doubling times which hinders a practical application. On this study, the enrichment on these bacteria was successfully achieved in a membrane bioreactor system at 28 °C. Despite biomass accumulation was not detected, a high apparent specific n-damo activity of 95.5 mg NO2−-N g−1 MLVSS d−1 was achieved after 388 days of operation, being one of the highest nitrite removal rates reported in the literature for n-damo cultures to date. Additionally a slow doubling time of 11.5 d was estimated. 16S rRNA gene amplicon sequencing analysis indicated that Candidatus Methylomirabilis became the most abundant bacterial organism by day 344 with a relative abundance of 50.2%. During the entire experiment ammonium was continuously added to the system as an alternative nitrogen source, to avoid biomass growth limitations. Finally, a relation between permeate nitrite concentrations and nitrous oxide production was found, which allows to optimize the process in terms of the minimization of both nitrogen species. The nitrous oxide emissions represented between 0 and 3.7% of the denitrified nitrogen
2021-03-26
2021-03-26
2018
journal article
Chemical Engineering Journal, 347 (2018), 721-730. doi: 10.1016/j.cej.2018.04.134
1385-8947
http://hdl.handle.net/10347/25023
10.1016/j.cej.2018.04.134
eng
https://doi.org/10.1016/j.cej.2018.04.134
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2013-46750-R/ES/TECNOLOGIA HOLISTICA DE BAJA HUELLA AMBIENTAL PARA EL TRATAMIENTO DE AGUAS RESIDUALES ORIENTADA A LA MINIMIZACION DE GASES DE EFECTO INVERNADERO, MICRO Y NANOCONTAMINANTES
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2016-80847-R/ES
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/BES-2014-069114/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/317542024-01-06T01:03:01Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Influence of Oxidation and Dialysis of Phlorotannins on Bioactivity and Composition of Ultrasound-Assisted Extracts from Ascophyllum nodosum
Moreira Martínez, Ramón Felipe
Gisbert Verdú, Mauro
Sineiro Torres, Jorge
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Phlorotannins
Oxidation
Molecular size
DPPH radical scavenging activity
FTIR
1H-NMR
Bioactivity
Fragmentation
Size distribution
The isolation and chemical characterization of phlorotannins has gained special attention in recent years due to their specific health-promoting benefits. Flow-cell ultrasound-assisted extraction (90 W/cm2 of sonication power, 2 min of retention time and 20 g solvent/g algae of liquid–solid ratio) was carried out by using double-distilled water (WE) and acetone:water mixture (AWE) as extraction solvents. The AWE showed a higher total polyphenols content (TPC), carbohydrates (CHOs) and antioxidant activities than WE. However, when the WE was purified by using Amberlite XAD16 column, the purified WE (PWE) showed similar a TPC, decreased CHOs and increased antioxidant activity compared to WE. The oxidation of the PWE extract was evaluated under natural, forced and severe oxidation condition for 120 h. Only severe oxidation conditions were able to significantly reduce TPC and antioxidant activities. PWE was dialyzed (20, 10, 3.5 and 2 kDa). The main bioactive fraction of phlorotannins was obtained from 10 to 20 kDa. CHOs were distributed in fractions below 20 kDa. MALDI-TOF analysis was performed for PWE, PD20 and PD2 extracts to analyze the degree of polymerization of phlorotannins, which ranged from 4 to 17 phloroglucinol units/molecule. Fragmentation patterns allowed the proximate identification of several phlorotannins in Ascophyllum nodosum extracts
2024-01-05
2024-01-05
2022-11-11
journal article
Gisbert, M., Sineiro, J., Moreira, R. (2022). Influence of Oxidation and Dialysis of Phlorotannins on Bioactivity and Composition of Ultrasound-Assisted Extracts from Ascophyllum nodosum. "Marine Drugs", vol. 20, 706
http://hdl.handle.net/10347/31754
10.3390/md20110706
eng
https://doi.org/10.3390/md20110706
http://creativecommons.org/licenses/by/4.0/deed.gl
open access
©2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
MDPI
oai:minerva.usc.es:10347/291182023-07-10T06:21:41Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Tannin-based bio-adhesives for the wood panel industry as sustainable alternatives to petrochemical resins
Arias Calvo, Ana
González García, Sara
Moreira Vilar, María Teresa
Feijoo Costa, Gumersindo
Universidade de Santiago de Compostela. Departamento de Patoloxía Animal
Bio-adhesives
Environmental impacts
Industrial ecology
Life cycle assessment
Non-isocyanate polyurethanes
Tannins
The development of natural-based adhesives is a key aspect in reducing the consumption of fossil resources, in adapting to legislation on the use of formaldehyde and in ensuring the sustainability of the wood panel industry. This study focuses on five alternatives for tannin-based adhesives (tannin-paraformaldehyde, tannin-glyoxal, tannin-hexamine, tannin non-isocyanate polyurethane (NIPU) with ammonium hydroxide and tannin NIPU with HDMA bio-adhesives) as potential proposals for the substitution of synthetic adhesives currently used: Urea-formaldehyde (UF), Phenol-formaldehyde (PF) and melamine urea formaldehyde (MUF). Modeling and simulation tools were used for the conceptual design of the reaction stage of the bio-adhesives due to the lack of real data from industrial scale production systems. The life cycle assessment methodology was used to identify the environmental impacts associated with the production processes of these bio-adhesives. The results obtained showed that tannin NIPU bio-adhesive with ammonium hydroxide has the best environmental profile, although the other alternative bio-adhesives also show good environmental profiles compared to synthetic adhesives. Sensitivity analyses have been carried out after evaluating the main hot spots in the production processes. In all of them, reductions of the environmental impacts have been observed, with the replacement of DMC by EC and the reduction of energy consumption being the options that showed the greatest improvements
2022-08-23
2022-08-23
2021
journal article
Journal of Industrial Ecology 2022;26:627–642. https://doi.org/10.1111/jiec.13210
http://hdl.handle.net/10347/29118
10.1111/jiec.13210
1530-9290
eng
https://doi.org/10.1111/jiec.13210
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/ PCI2018-092866/ES/PRODUCCION DE BIOADHESIVOS AMBIENTALMENTE AMIGABLES A PARTIR DE RECURSOS RENOVABLES
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. © 2021 The Authors. Journal of Industrial Ecology published by Wiley Periodicals LLC on behalf of Yale University
Wiley
oai:minerva.usc.es:10347/182792021-02-01T12:38:37Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Organic overloading affects the microbial interactions during anaerobic digestion in sewage sludge reactors
Braz, Guilherme H. R.
Fernández González, Nuria
Lema Rodicio, Juan Manuel
Carballa Arcos, Marta
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anaerobic microbiome
Glycerol
Methanosaeta
Sludge digestion
Veillonellaceae
This is the accepted manuscript of the following article: Braz, G., Fernandez-Gonzalez, N., Lema, J., & Carballa, M. (2019). Organic overloading affects the microbial interactions during anaerobic digestion in sewage sludge reactors. Chemosphere, 222, 323-332. doi: 10.1016/j.chemosphere.2019.01.124
There is still a lack of information about microbial interactions of anaerobic digestion microbiome during process disturbance which limits our ability to predict the mechanisms that drive community dynamics on these events. This paper aims to determine how an organic overloading affects these interactions and to characterize in detail the microbiome structure and diversity in sewage sludge anaerobic reactors during an acidosis event. Two identical sewage sludge anaerobic reactors were subjected to an organic loading shock by adding glycerol waste. As consequence, volatile fatty acids accumulated after only 24 h (up to 2.5 g/L) while Bacteroidales and Methanomicrobiales became displaced by Firmicutes and Methanosaeta sp, showing that reactor acidosis can occur without an immediate decline of this methanogen. Network analysis revealed 9 clusters of co-occurring microorganisms with different behaviors during overloading. At first, Veillonellaceae family, the main glycerol degrading, associated with Candidatus Cloacimonetes, volatile fatty acids fermenters, increased their relative abundance in detriment of the syntrophic bacteria; although as conditions become more acidic, these groups were displaced by other fermenters like Porphyromonadaceae and Chitinophagaceae. Eventually, the methanogenesis failed 72 h after organic overloading, when pH reached values lower than 6. Overall, our results showed a succession of functionally redundant microorganisms, most likely because of niche specialization during organic overloading. The detailed temporal analysis elucidated the processes governing the dynamics anaerobic digestion microbiome, a knowledge required to develop anaerobic digestion management strategies based on its microbiome during process disturbances
2019-02-14
2021-01-23
2019-05
journal article
Braz, G., Fernandez-Gonzalez, N., Lema, J., & Carballa, M. (2019). Organic overloading affects the microbial interactions during anaerobic digestion in sewage sludge reactors. Chemosphere, 222, 323-332. doi: 10.1016/j.chemosphere.2019.01.124
0045-6535
http://hdl.handle.net/10347/18279
10.1016/j.chemosphere.2019.01.124
eng
https://doi.org/10.1016/j.chemosphere.2019.01.124
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/156422023-07-10T06:12:53Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Short and long term orange dye effects over AOB and anammox activities
Val del Río, María Ángeles
Stachurski, A.
Méndez Pampín, Ramón José
Campos Gómez, José Luis
Surmacz-Górska, Joanna
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anammox
AOB
Nitrogen removal
Orange dye
Partial nitritation
Adsorption
"This is the pre-peer reviewed version of the following article: Val del Río, A., Stachurski, A., Méndez, R., Campos, J. L., Surmacz-Górska, J., & Mosquera-Corral, A. (2017). Short- and long-term orange dye effects on ammonium oxidizing and anammox bacteria activities. Water Science and Technology, 76(1), 79-86, which has been published in final form at [http://dx.doi.org/10.2166/wst.2017.186. This article may be used for non-commercial purposes in accordance with IWA Publishing."
In this research work the effects of orange azo dye over ammonia oxidizing bacteria (AOB) and anammox bacteria activities were tested. Adsorption onto the biomass was detected with both types of biomass however no biological decolourization occurred. Performed batch tests indicated that concentrations lower than 650 mgorange/L stimulated AOB activity while anammox bacteria activity was inhibited at concentrations higher than 25 mgorange/L. Long-term performance of both processes was tested in the presence of 50 mgorange/L. In the case of the partial nitritation process both the biomass concentration and the specific AOB activity increased after 50 days of orange azo dye addition. Regarding the anammox process, specific activity decreased down to 58% after 12 days of operation; however, initial values were restored 54 days after stopping the dye addition
2017-07-24
2017-07-24
2016-09-07
journal article
http://hdl.handle.net/10347/15642
eng
http://dx.doi.org/10.2166/wst.2017.186
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-55021-R/ES/SISTEMA SOSTENIBLE PARA LA VALORIZACION DE AGUAS RESIDUALES DE CONSERVERA DE PESCADO A TRAVES DE LA PRODUCCION DE BIOPOLIMEROS
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2014-55397-JIN/ES/DESARROLLO DE SISTEMAS SOSTENIBLES BASADOS EN BIOMASA GRANULAR PARA EL TRATAMIENTO DE AGUAS RESIDUALES PROCEDENTES DE LA INDUSTRIA DE PRODUCTOS DEL MAR
open access
oai:minerva.usc.es:10347/184642023-07-10T06:16:14Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
ENERWATER - A standard method for assessing and improving the energy efficiency of wastewater treatment plants
Longo, Stefano
Mauricio Iglesias, Miguel
Soares, Ana
Campo, Pablo
Fatone, Francesco
Eusebi, Anna Laura
Akkersdijk, Erik
Stefani, Linda
Hospido Quintana, Almudena
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Wastewater treatment plant
Key performance indicators (KPI)
Benchmarking
Label
Diagnosis
This paper describes the first methodology specifically tailored to estimate energy efficiency at wastewater treatment plants (WWTPs). Inspired by the cycle of continuous improvement, the method (i) precisely defines the concept of energy efficiency in WWTPs, (ii) proposes systematic and comparable ways to measure it, and (iii) allows benchmarking and diagnosing energy hotspots. The methodology delivers an aggregated measure of the WWTP energy efficiency defined as the Water Treatment Energy Index, a single energy label that uses universally known illustrations enabling wide communication of standardized information on the WWTP energy status. The accuracy, reproducibility and generality of the methodology were validated by a widespread energy benchmarking method, and a case study is presented to show its capabilities. By promoting dialogue towards the creation of a specific European Standard, the actions accomplished by the H2020 Coordination Support Action ENERWATER should positively contribute to improving the exchange of information on energy saving actions and results between wastewater utilities and towards other stakeholders
2019-03-22
2021-03-21
2019-05-15
journal article
Longo, S., Mauricio-Iglesias, M., Soares, A., Campo, P., Fatone, F., & Eusebi, A. et al. (2019). ENERWATER – A standard method for assessing and improving the energy efficiency of wastewater treatment plants. Applied Energy, 242, 897-910. doi: 10.1016/j.apenergy.2019.03.130
0306-2619
http://hdl.handle.net/10347/18464
10.1016/j.apenergy.2019.03.130
eng
https://doi.org/10.1016/j.apenergy.2019.03.130
info:eu-repo/grantAgreement/EC/H2020/649819
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© Elsevier 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. (http://creativecommons.org/licenses/BY-NC-ND/4.0/). Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/275902023-07-10T06:11:11Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Combining offshore wind and solar photovoltaic energy to stabilize energy supply under climate change scenarios: a case study on the western Iberian Peninsula
Costoya Noguerol, Jorge
Castro Rodríguez, María Teresa de
Carvalho, David João da Silva
Arguilé Pérez, Beatriz
Gómez Gesteira, Moncho
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Offshore wind energy
Solar energy
CORDEX
Climate change
West Iberian Peninsula
Climate projections
The expansion of marine renewable power is a major alternative for the reduction of greenhouse gases emissions. In Europe, however, the high penetration of offshore wind brings intermittency and power variability into the existing power grid. Offshore solar photovoltaic power is another technological alternative under consideration in the plans for decarbonization. However, future variations in wind, air temperature or solar radiation due to climate change will have a great impact on both renewable energy resources. In this context, this study focusses on the offshore energy assessment off the coast of Western Iberia, a European region encompassing Portugal and the Northwestern part of Spain. Making use of a vast source of data from 35 simulations of a research project called CORDEX, this study investigates the complementarity of offshore wind and solar energy sources with the aim of improving the energy supply stability of this region up to 2040. Although the offshore wind energy resource has proven to be higher than solar photovoltaic resource at annual scale, both renewable resources showed significant spatiotemporal energy variability throughout the western Iberian Peninsula. When both renewable resources are combined, the stability of the energy resource increased considerably throughout the year. The proposed wind and solar combination scheme is assessed by a performance classification method called Delphi, considering stability, resource, risk, and economic factors. The total index classification increases when resource stability is improved by considering hybrid offshore wind-photovoltaic solar energy production, especially along the nearshore water
2022-02-21
2022-02-21
2022
journal article
Renewable and Sustainable Energy Reviews 157 (2022) 112037
http://hdl.handle.net/10347/27590
10.1016/j.rser.2021.112037
1364-0321
eng
https://doi.org/10.1016/j.rser.2021.112037
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113245RB-I00/ES/SUPERVIVENCIA DE DISPOSITIVOS CAPTADORES DE ENERGIA DE LAS OLAS
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/303182023-03-16T03:03:16Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Removal of copper from aqueous solutions by biosorption onto pine sawdust
Orozco Fontán, Clara Isabel
Freire Leira, María Sonia
Gómez Díaz, Diego
González Álvarez, Julia
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Copper
Heavy metal
Sawdust
Pinus radiata
Biosorption
Untreated Pinus radiata sawdust was investigated for the removal of Cu+2 ions from aqueous solutions. The biomass was characterized by Inductively Coupled Plasma-Mass (ICP-MS) spectrometry and by Scanning Electron Microscopy with an Energy Dispersive X-ray spectroscopy (SEM-EDX), X-Ray crystalline powder Diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy, before and after adsorption. The influence of contact time (up to equilibrium), adsorbent dose (1–50 g/L), initial metal ion concentration (5–300 mg/L) and pH (2–8) on copper sorption efficiency was studied through batch experiments. The results demonstrated that adsorption equilibrium is reached in less than 2 h and the best conditions (Cu+2 removal percentage, 93.4% and adsorption capacity, 0.82 mg/g) were achieved by increasing the adsorbent dose up to 5 g/L and the solution pH up to 7, and decreasing the initial metal concentration to 5 mg/L. The adsorption was optimized by means of a Doehlert experimental design analyzing the influence of adsorbent dose (5–15 g/L) and copper initial concentration (5–45 mg/L) on adsorption efficiency. Kinetic data were satisfactorily fitted to the second-order kinetic model. Intraparticle diffusion model demonstrated that different stages are involved in the adsorption process. Langmuir isotherms fitted satisfactorily the copper bioadsorption equilibrium data. Desorption studies achieved high efficiencies up to 94.5% and the possibility of sawdust regeneration was studied with four adsorption-desorption cycles. Thus, this study evidenced that sawdust is a promising efficient, renewable and economic adsorbent for metal removal and its use for that purpose constitutes an alternative for its management and valorization
2023-03-15
2023-03-15
2023
journal article
Sustainable Chemistry and Pharmacy 32 (2023) 101016
2352-5541
http://hdl.handle.net/10347/30318
10.1016/j.scp.2023.101016
eng
https://doi.org/10.1016/j.scp.2023.101016
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/307432023-12-20T09:15:09Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Water sorption isotherms of different sodium alginates : thermodynamic evaluation and influence of mannuronate-guluronate copolymers
Montes, Leticia
Gisbert Verdú, Mauro
Moreira Martínez, Ramón Felipe
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Water desorption isotherms of three alginates with different structural features were determined at 25, 37, and 50°C. The Halsey model was selected to fit the equilibrium water sorption data. Differential and integral enthalpy and entropy were estimated for tested alginates. Optimal storage conditions of tested alginates (moisture content from 0.15 to 0.20 kg water/kg dry solid and relative humidity from 35% to 50%) were determined from the maximum and minimum integral enthalpy and entropy values, respectively. A model was proposed to estimate the water sorption isotherms of al-ginates based on the alginate monomers (mannuronate, M, and guluronate, G) at low water activity (<0.4). M fraction was mainly responsible for the hygroscopicity of algi-nates. Alginates with similar G fraction showed different hygroscopic features by the presence of more homopolymeric G blocks that could form helical structures at low moisture content, decreasing the water affinity
2023-06-21
2023-06-21
2022
journal article
Montes, L., Gisbert, M., & Moreira, R. (2022). Water sorption isotherms of different sodium alginates: Thermodynamic evaluation and influence of mannuronate-guluronate copolymers. Journal of Food Processing and Preservation, 46, e17179. https://doi.org/10.1111/jfpp.17179
0145-8892
http://hdl.handle.net/10347/30743
10.1111/jfpp.17179
1745-4549
eng
https://doi.org/10.1111/jfpp.17179
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-095919-B-C21/ES/INCORPORACION DE FLOROTANINOS Y ALMIDON PARA OBTENER ALIMENTOS LIBRES DE GLUTEN SALUDABLES DIRIGIDOS AL CONTROL DE LA RESPUESTA GLICEMICA
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-095919-B-C22/ES/AISLAMIENTO Y CARACTERIZACION DE FLOROTANINOS COMO ANTIOXIDANTES, AGENTES DE ENTRECRUZAMIENTO E INHIBIDORES ENZIMATICOS EN MATERIALES AMILACEOS
http://creativecommons.org/licenses/by-nc/4.0/
open access
© 2022 The Authors. Journal of Food Processing and Preservation published by Wiley Periodicals LLC. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Wiley
oai:minerva.usc.es:10347/215182020-04-18T02:00:47Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
A portable extensional rheometer for measuring the viscoelasticity of pitcher plant and other sticky liquids in the field
Collett, Catherine
Ardron, Alia
Bauer, Ulrique
Chapman, Gary
Chaudan, Elodie
Hallmark, Bart
Pratt, Lee
Torres Pérez, María Dolores
Willson, D Ian
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Biological fluids
Filament
Giesekus
Nepenthes
Pitcher plants
Polymer solution
Polysaccharide
Rheometry
Biological fluids often have interesting and unusual physical properties to adapt them for their specific purpose. Laboratory-based rheometers can be used to characterise the viscoelastic properties of such fluids. This, however, can be challenging as samples often do not retain their natural properties in storage while conventional rheometers are fragile and expensive devices ill-suited for field measurements. We present a portable, low-cost extensional rheometer designed specifically to enable in situ studies of biological fluids in the field. The design of the device (named Seymour) is based on a conventional capillary break-up extensional rheometer (the Cambridge Trimaster). It works by rapidly stretching a small fluid sample between two metal pistons. A battery-operated solenoid switch triggers the pistons to move apart rapidly and a compact, robust and inexpensive, USB 3 high speed camera is used to record the thinning and break-up of the fluid filament that forms between the pistons. The complete setup runs independently of mains electricity supply and weighs approximately 1 kg. Post-processing and analysis of the recorded images to extract rheological parameters is performed using open source software.
2020-04-17
2020-04-17
2015
journal article
Collett, C., Ardron, A., Bauer, U. et al. A portable extensional rheometer for measuring the viscoelasticity of pitcher plant and other sticky liquids in the field. Plant Methods 11, 16 (2015). https://doi.org/10.1186/s13007-015-0059-5
1746-4811
http://hdl.handle.net/10347/21518
10.1186/s13007-015-0059-5
eng
https://doi.org/10.1186/s13007-015-0059-5
https://creativecommons.org/licenses/by/4.0/
open access
© 2015 Collett et al.; licensee BioMed Central. This is an Open Access article distributed under the terms of the CreativeCommons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, andreproduction in any medium, provided the original work is properly credited. The Creative Commons Public DomainDedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article,unless otherwise stated
BioMedCentral
oai:minerva.usc.es:10347/226472020-10-02T08:37:24Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Effect of Free Ammonia, Free Nitrous Acid, and Alkalinity on the Partial Nitrification of Pretreated Pig Slurry, Using an Alternating Oxic/Anoxic SBR
Belmonte, Marisol
Hsieh, Chia-Fang
Campos Gómez, José Luis
Guerrero, Lorna
Méndez Pampín, Ramón José
Mosquera Corral, Anuska
Vidal, Gladys
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Free Ammonia
Free Nitrous Acid
Alkalinity
Partial Nitrification
Pretreated Pig Slurry
SBR
The effect of free ammonia (NH3 or FA), free nitrous acid (HNO2 or FNA), and total alkalinity (TA) on the performance of a partial nitrification (PN) sequencing batch reactor (SBR) treating anaerobically pretreated pig slurry was studied. The SBR was operated under alternating oxic/anoxic (O/A) conditions and was fed during anoxic phases.This strategy allowed using organic matter to partially remove nitrite (NO2−) and nitrate (NO3−) generated during oxic phases.The desired NH4+ to NO2− ratio of 1.3 g N/g N was obtained when an Ammonium Loading Rate (ALR) of 0.09 g NH4+-N/L⋅d was applied. The system was operated at a solid retention time (SRT) of 15–20 d and dissolved oxygen (DO) levels higher than 3 mg O2/L during the whole operational period. PN mainly occurred caused by the inhibitory effect of FNA on nitrite oxidizing bacteria (NOB). Once HNO2 concentration was negligible,NH4+ was fully oxidized to NO3− in spite of the presence of FA. The use of biomass acclimated to ammonium as inoculum avoided a possible effect of FA on NOB activity.
2020-05-28
2020-05-28
2017
journal article
Belmonte, M., Hsieh, C. F., Campos, J. L., Guerrero, L., Méndez, R., Mosquera-Corral, A., and Vidal, G. (2017). Effect of Free Ammonia, Free Nitrous Acid, and Alkalinity on the Partial Nitrification of Pretreated Pig Slurry, Using an Alternating Oxic/Anoxic SBR. BioMed research international, 2017. https://dx.doi.org/10.1155/2017/6571671
2314-6133
http://hdl.handle.net/10347/22647
10.1155/2017/6571671
2314-6141
eng
https://doi.org/10.1155/2017/6571671
http://creativecommons.org/licenses/by/4.0/
open access
Copyright © 2017 Marisol Belmonte et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Hindawi
oai:minerva.usc.es:10347/199032021-09-23T01:00:09Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Performance of partial nitritation-anammox processes at mainstream conditions in an IFAS system
Pedrouso Fuentes, Alba
Trela, Jozef
Val del Río, María Ángeles
Mosquera Corral, Anuska
Plaza, Elzbieta
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anammox
Autotrophic nitrogen removal
Integrated fixed film activated sludge
Mainstream
Nitritation
The partial nitritation-anammox processes implementation in the main line of wastewater treatment plants would lead them closer to the energy autarky. With this purpose, an integrated fixed film activated sludge (IFAS) reactor was operated at pilot scale. Efficient nitrogen removal (72 ± 11 %) was achieved for anaerobically pre-treated municipal wastewater at low temperature (21 - 15 ºC), with a nitrogen removal rate of 37 ± 3 g N/(m3·d) at 15 °C. The ammonium oxidizing bacteria were more abundant in the activated sludge, while anammox bacteria were primarily located in biofilm attached onto the carriers surface. Nitrite oxidizing bacteria (NOB) activity was similar between both fractions and its specific activity decreased more than that of other populations when the operating temperature was reduced. Furthermore, the IFAS operational strategy (aerobic/anoxic periods) allowed an efficient NOB activity suppression inside the reactor, which accounted only for the 10 - 20 % of the maximum potential activity
2019-10-17
2021-09-23
2019
journal article
Pedrouso, A., Trela, J., Val del Rio, A., Mosquera-Corral, A., & Plaza, E. (2019). Performance of partial nitritation-anammox processes at mainstream conditions in an IFAS system. Journal Of Environmental Management, 250, 109538. doi: 10.1016/j.jenvman.2019.109538
0301-4797
http://hdl.handle.net/10347/19903
10.1016/j.jenvman.2019.109538
eng
https://doi.org/10.1016/j.jenvman.2019.109538
embargoed access
© 2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/233112023-07-10T06:12:09Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Phase Equilibria of 1-hexyl-3-methylimidazolium acetate with water and oil
Corchero Morais, Raquel
Rodríguez Escontrela, Iria
Rodríguez Figueiras, Óscar
Soto Campos, Ana María
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Ionic liquid
Water
Oil
Equilibrium
EOR
Ionic liquids have increased the possibilities of Enhanced Oil Recovery (EOR) with surfactants. However, results obtained with only one of these salts as surfactant are not particularly promising. Best results are obtained with blends of these salts or blends with traditional surfactants. This work aims to break new ground regarding the role of ionic liquids in this application. Many traditional surfactants in EOR fail because they are not sufficiently soluble at optimal salinity in water. The possibilities of design of ionic liquids must also be considered to use them as co-surfactants in optimal formulations for oil recovery. In this work, the phase behaviour of the ionic liquid 1-hexyl-3-methylimidazolium acetate with water and different model oils (n-octane, cyclohexane and toluene) was determined at 298.15 K and 323.15 K. The complete miscibility of the ionic liquid with water and its low miscibility with the different oils, point to the use of 1-hexyl-3-methylimidazolium acetate as co-surfactant with surfactants with high oil solubilising capacity
2020-09-29
2020-11-12
2019
journal article
Fluid Phase Equilibria, 483 (2019), 144-152, https://doi.org/10.1016/j.fluid.2018.11.010
0378-3812
http://hdl.handle.net/10347/23311
10.1016/j.fluid.2018.11.010
eng
https://doi.org/10.1016/j.fluid.2018.11.010
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2015-68496-P/ES/RECUPERACION MEJORADA DEL PETROLEO MEDIANTE EL USO DE LIQUIDOS IONICOS SURFACTANTES
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Elsevier
oai:minerva.usc.es:10347/275082023-07-10T06:10:57Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2940com_10347_2892com_10347_2888com_10347_2955com_10347_2893col_10347_15636col_10347_20715col_10347_12271col_10347_12262
Benchmarking tertiary water treatments for the removal of micropollutants and pathogens based on operational and sustainability criteria
Boer, Sabrina de
González Rodríguez, Jorge
Moreira Vilar, María Teresa
Conde López, Julio José
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Review
Tertiary treatment
LCA
Economic evaluation
Emerging pollutants
In a context of increasing water scarcity, it is essential to ensure an integrated watershed management, savings in the consumption of water as a finite resource and improve the performance of wastewater treatment plants to guarantee the quality of treated effluents. Therefore, advanced technologies for tertiary wastewater treatment have been widely studied in recent decades. These treatments have been reviewed over the years mainly providing comparisons from a technical perspective. However, there is a lack of a holistic evaluation considering environmental and economic aspects together with the aforementioned technical aspects. In this review, treatment alternatives for micropollutant and pathogen abatement have been identified based on technologies implemented on a large scale (ozonation, ultraviolet treatment, adsorption on activated carbon or membrane filtration) as well as those treatments in the process of implementation, such as electrochemical, Fenton-based or photocatalytic techniques. Thus, a systematic bibliographic search was performed considering works applying pilot and full-scale equipment, leaving lab-scale results out of the analysis. The description of each process allowed the identification of the technical feasibility, operating costs and associated environmental impacts, providing a comparative assessment that will help decision-making in the development and application of the different technologies. The benchmarking results reveal that the selected treatment should be chosen based on the source and specific pollutants present in the wastewater, as there is no single solution for the treatment of micropollutants and pathogens. In addition, recommendations are presented for the publication of reliable process-related data to facilitate comparison between different technologies and treatment scenarios.
2022-02-08
2022-02-08
2022
journal article
Journal of Water Process Engineering, 46 (2022) 102587 DOI: 10.1016/j.jwpe.2022.102587
http://hdl.handle.net/10347/27508
10.1016/j.jwpe.2022.102587
2214-7144
eng
https://doi.org/10.1016/j.jwpe.2022.102587
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/ PID2019-111163RB-I00/ES/NANOCATALIZADORES DE ALTO RENDIMIENTO PARA APLICACIONES MEDIOAMBIENTALES (HP-NANOBIO)
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PDC2021-121540-I00/ES
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Elsevier
oai:minerva.usc.es:10347/183252023-07-10T06:16:16Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Biotransformation of organic micropollutants by anaerobic sludge enzymes
González Gil, Lorena
Krah, Daniel
Ghattas, Ann-Kathrin
Carballa Arcos, Marta
Wick, Arne
Helmholz, Lissa
Lema Rodicio, Juan Manuel
Ternes, Thomas A.
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anaerobic digestion
Degradation
Enzymatic transformation
Enzymatic pathways
Pharmaceuticals
Sewage treatment plant
This is the accepted manuscript of the following article: Gonzalez-Gil, L., Krah, D., Ghattas, A., Carballa, M., Wick, A., & Helmholz, L. et al. (2019). Biotransformation of organic micropollutants by anaerobic sludge enzymes. Water Research, 152, 202-214. doi: 10.1016/j.watres.2018.12.064
Biotransformation of organic micropollutants (OMPs) in wastewater treatment plants ultimately depends on the enzymatic activities developed in each biological process. However, few research efforts have been made to clarify and identify the role of enzymes on the removal of OMPs, which is an essential knowledge to determine the biotransformation potential of treatment technologies. Therefore, the purpose of the present study was to investigate the enzymatic transformation of 35 OMPs under anaerobic conditions, which have been even less studied than aerobic systems. Initially, 13 OMPs were identified to be significantly biotransformed (>20%) by anaerobic sludge obtained from a full-scale anaerobic digester, predestining them as potential targets of anaerobic enzymes. Native enzymes were extracted from this anaerobic sludge to perform transformation assays with the OMPs. In addition, the effect of detergents to recover membrane enzymes, as well as the effects of cofactors and inhibitors to promote and suppress specific enzymatic activities were evaluated. In total, it was possible to recover enzymatic activities towards 10 out of these 13 target OMPs (acetyl-sulfamethoxazole and its transformation product sulfamethoxazole, acetaminophen, atenolol, clarithromycin, citalopram, climbazole, erythromycin, and terbutryn, venlafaxine) as well as towards 8 non-target OMPs (diclofenac, iopamidol, acyclovir, acesulfame, and 4 different hydroxylated metabolites of carbamazepine). Some enzymatic activities likely involved in the anaerobic biotransformation of these OMPs were identified. Thereby, this study is a starting point to unravel the still enigmatic biotransformation of OMPs in wastewater treatment systems
2019-03-04
2021-01-11
2019-04-01
journal article
Gonzalez-Gil, L., Krah, D., Ghattas, A., Carballa, M., Wick, A., & Helmholz, L. et al. (2019). Biotransformation of organic micropollutants by anaerobic sludge enzymes. Water Research, 152, 202-214. doi: 10.1016/j.watres.2018.12.064
0043-1354
http://hdl.handle.net/10347/18325
10.1016/j.watres.2018.12.064
eng
https://doi.org/10.1016/j.watres.2018.12.064
info:eu-repo/grantAgreement/EC/H2020/267897
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Elsevier
oai:minerva.usc.es:10347/312162023-11-09T01:02:57Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Impact of dissolved sulfide on a hybrid membrane bioreactor treating the effluent of a mainstream up-flow anaerobic sludge blanket
Allegue Martínez, Tomás Francisco
Arias Baño, Adrián
Liñares Lamas, Alberto
Omil Prieto, Francisco
Garrido Fernández, Juan Manuel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Despite being toxic to some microbes in wastewater treatment, sulfide can also promote nitrogen removal through sulfide-oxidizing bacteria. This study evaluates the dissolved sulfide impact on a hybrid MBR treating the effluent of a mainstream UASB. A UASB-MBR (176 L) was fed with synthetic domestic sewage and operated for 154 days. Two periods were distinguished, one without (Period I) and one with (Period II) sulfide dissolved in the UASB effluent. Dissolved methane, COD, nitrogen, and organic micropollutants (OMP)s removals accomplished in the MBR during both periods were compared. Initially, sulfide inhibited methane removal, but once fully oxidized into sulfate in the anoxic compartment, the efficiencies recovered to similar levels as without sulfide (>70%). Sulfide additions significantly enhanced the MBR denitrification potential through sulfide-oxidizing bacteria, with improved removals in Period II (63.4 TN Lfeed−1) compared to Period I (40 mg TN Lfeed−1). Most of the nitrogen removal occurred in the anoxic compartment of the MBR, however, up to 21% of the nitrogen was denitrified in the aerobic compartment within the biofilm carriers. Aerobic methane oxidation coupled with denitrification, heterotrophic denitrifiers, sulfide oxidation, and anammox processes were involved in the nitrogen removal. COD and OMPs removals were not affected by sulfide
2023-11-08
2023-11-08
2023-08-30
journal article
Environ. Sci.: Water Res. Technol., 2023, 9, 2733-2744
2053-1400
http://hdl.handle.net/10347/31216
10.1039/d3ew00404j
2053-1419
eng
https://doi.org/10.1039/D3EW00404J
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-110346RB-C21/ES/ANALISIS DE LA RESISTENCIA A ANTIBIOTICOS Y SU BIOTRANSFORMACION EN PLANTAS INNOVADORAS QUE PROMUEVEN LA RECUPERACION DE CARBONO LINEA DE AGUAS/
info:eu-repo/grantAgreement/MINECO//BES-2014-069114/ES/BES-2014-069114/
http://creativecommons.org/licenses/by-nc/4.0/
open access
This Open Access Article is licensed under a Creative Commons Attribution-Non Commercial 3.0 Unported Licence
Atribución-NoComercial 4.0 Internacional
Royal Society of Chemistry
oai:minerva.usc.es:10347/219052023-07-10T06:18:16Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Optimization of the Extraction of Bioactive Compounds from Walnut (Juglans major 209 x Juglans regia) Leaves: Antioxidant Capacity and Phenolic Profile
Fernández Agulló, Adela
Castro Iglesias, Aída
Freire Leira, María Sonia
González Álvarez, Julia
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
AOPs
Zinc oxide
Nanoclusters
Photocatalysis
UVA
Visible light
This work studies the extraction of phenolic compounds from walnut leaves of the hybrid Juglans major 209 x Juglans regia based on extract antioxidant capacity. Once the solid/liquid ratio was selected (1/10 g/mL), by means of a Box-Benkhen experimental design, the influence of temperature (25–75 °C), time (30–120 min), and aqueous ethanol concentration (10–90%) on extraction yield and ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and 2,2’-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) antioxidant activities were analyzed. In all cases, the quadratic effect of % EtOH was the most significant, followed by the linear effect of temperature and, for most of the responses, the effect of time was almost negligible. Response surface analysis allowed to select the optimal extraction conditions: 75 °C, 120 min and 50% ethanol, which led to the following extract properties: extraction yield, 30.17%; FRAP, 1468 nmol ascorbic acid equivalents (AAE)/mg extract d.b.; DPPH, 1.318 mmol Trolox equivalents (TRE)/g extract d.b.; DPPH EC50, 0.11 mg/mL; ABTS, 1.256 mmol TRE/g extract (on dry basis) and ABTS EC50, 0.985 mg/mL. Quercetin 3-β-D-glucoside, neochlorogenic acid, and chlorogenic acid, in this order, were the main compounds identified in this extract by ultra-performance liquid chromatography coupled with electrospray ionization and time-of-flight mass spectrometry (UPLC/ESI-QTOF-MS), with various potential applications that support this valorization alternative for walnut leaves
2020-04-29
2020-04-29
2020
journal article
Fernández-Agulló, A.; Castro-Iglesias, A.; Freire, M.S.; González-Álvarez, J. Optimization of the Extraction of Bioactive Compounds from Walnut (Juglans major 209 x Juglans regia) Leaves: Antioxidant Capacity and Phenolic Profile. Antioxidants 2020, 9, 18
http://hdl.handle.net/10347/21905
10.3390/antiox9010018
2076-3921
eng
https://doi.org/10.3390/antiox9010018
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2016-79461-R/ES
https://creativecommons.org/licenses/by/4.0/
open access
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
MDPI
oai:minerva.usc.es:10347/317582024-01-06T01:03:02Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Interactions between Ascophyllum nodosum Seaweeds Polyphenols and Native and Gelled Corn Starches
Gisbert, Mauro
Aleixandre, Andrea
Sineiro Torres, Jorge
Rosell, Cristina M.
Moreira Martínez, Ramón Felipe
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
ABTS
Adsorption
Antioxidant activities
Carbohydrates
DPPH
FRAP
The effect of several blending procedures between Ascophyllum nodosum seaweed flour (AF) and corn starch (CS) on the interactions between polyphenols and starch was studied in this paper. These methods comprised the blending of AF with native starch (NT) with previously gelled starch gel (GL) and promoting the gelling of corn starch in the presence of AF (CGL). Different AF–CS (g/g) ratios (from 1:0.5 to 1:25) were studied. The liquid phase was chemically characterized by polyphenols (TPC) and carbohydrates content. The antioxidant activity of the liquid phase after achieving the solid–liquid equilibrium was determined by DPPH, ABTS, and FRAP methods. The solid phase was characterized by FT-IR and SEM techniques. The Halsey model successfully fitted the equilibrium TPC in liquid and polyphenols adsorbed/retained by the solid phase of tested systems. NT samples showed lower polyphenols sorption than gelled samples. The differences found between samples obtained with GL and CGL methods suggested different interactions between polyphenols and starch. Specifically, physisorption is predominant in the case of the GL method, and molecular trapping of polyphenols in the starch gel structure is relevant for the CGL method. Results allowed us to determine the enhancement of the retention of polyphenols to achieve starchy foods with high bioactivity.
2024-01-05
2024-01-05
2022-04-18
journal article
Gisbert, M., Aleixandre, A., Sineiro, J., Rosell, C.M., Moreira, R.F., (2022). Interactions between Ascophyllum nodosum Seaweeds Polyphenols and Native and Gelled Corn Starches. "Foods"vol.11,1-15
http://hdl.handle.net/10347/31758
10.3390/foods11081165
eng
https://doi.org/10.3390/foods11081165
http://creativecommons.org/licenses/by/4.0/deed.gl
open access
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
MDPI
oai:minerva.usc.es:10347/273012023-07-10T06:11:49Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Environmental assessment of menus for toddlers serviced at nursery canteen following the Atlantic diet recommendations
González García, Sara
Esteve Llorens, Xavier
González García, Rebeca
González Vázquez, Luz
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Leis Trabazo, María Rosaura
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Carbon footprint
Consumptive water footprint
Life cycle assessment
Meal service
Sustainable diet
Menus served at public services can be considered as a good opportunity for consumers to demand a service that ensures healthy and environmentally friendly food. It is especially in the sector of nurseries and schools, where these demands make the most sense since they call for the protection of particularly vulnerable population: children. The purpose of this study is to analyze the biweekly menus served at a public Spanish nursery canteen considering the link with the two most recognized environmental indicators: the consumptive water footprint (WF) and the carbon footprint (CF). The WF and CF of the menus vary considerably between menus (619–1359 L·menu−1 and 0.75–2.95 kg CO2eq·menu−1). The assessment has identified non-dairy sources of protein and dairy-based products as the key food categories in all menus. Menus with more meat (mostly beef) and dairy products (mainly cheese) were associated with higher impacts. That is, the average impact of menus with beef is about 2 times greater than the one of all other menus.
The distribution and cooking stages presented negligible contributions in terms of greenhouse gases emissions, mainly due to the consumption of local/regional products and low-energy intensive cooking techniques. The most important strategy for reducing environmental impacts is based on reducing the frequency of consumption of beef, so that poultry and lean pork are consumed alternately. This reduction should not compromise the necessary protein intake for toddlers. Attention should also be paid to afternoon snacks that are rich in cold meat and dairy products. Considering these issues, significant reductions in WF and CF indicators could be achieved, up to 550 L·menu−1 and 0.70 kg CO2eq·menu−1. Since eating habits introduced at an early stage are more likely to develop into adult behaviour, children canteen services are an excellent opportunity to promote healthy eating habits in children and their families
2021-12-29
2021-12-29
2021
journal article
Science of The Total Environment 770 (2021) 145342
http://hdl.handle.net/10347/27301
10.1016/j.scitotenv.2021.145342
0048-9697
eng
https://doi.org/10.1016/j.scitotenv.2021.145342
info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/PI16/01301/ES/Pubertad y riesgo metabólico en niños obesos: alteraciones epigenéticas e implicaciones fisiopatológicas y diagnósticas. Estudio PUBMEP
info:eu-repo/grantAgreement/MINECO/Programa Estatal de Promoción del Talento y su Empleabilidad/RYC-2014-14984/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2021 The Authors. Published by Elsevier B.V. This work is licenced under a CC Attribution-NonCommercial-NoDerivatives 4.0 International licence (CC BY-NC-ND 4.0)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/217602021-03-11T13:40:50Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Recovery and concentration of antioxidants from winery wastes
Soto, María Luisa
Conde, Enma
González López, Noelia
Conde, María Jesús
Moure, Andrés
Sineiro Torres, Jorge
Falqué, Elena
Domínguez, Herminia
Núñez García, María José
Parajó, Juan Carlos
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Winery wastes
Phenolics
Adsorption
Resins
Radical scavengers
Grape and wine byproducts have been extensively studied for the recovery of phenolic compounds with antioxidant activity and a variety of biological actions. The selective recovery and concentration of the phenolic compounds from the liquid phase separated from further diluted winery wastes has been proposed. Adsorption onto non ionic polymeric resins and further desorption with ethanolic solutions was studied. Several commercial food grade resins were screened with the aim of selecting the most suited for the practical recovery of phenolic compounds with radical scavenging activity. Under the optimized desorption conditions (using Sepabeads SP207 or Diaion HP20 as adsorbents and eluting with 96% ethanol at 50 °C) a powdered yellow-light brown product with 50% phenolic content, expressed as gallic acid equivalents, was obtained. The radical scavenging capacity of one gram of product was equivalent to 2–3 g of Trolox
2020-04-26
2020-04-26
2012
journal article
Soto, M.L.; Conde, E.; González-López, N.; Conde, M.J.; Moure, A.; Sineiro, J.; Falqué, E.; Domínguez, H.; Núñez, M.J.; Parajó, J.C. Recovery and Concentration of Antioxidants from Winery Wastes. Molecules 2012, 17, 3008-3024
http://hdl.handle.net/10347/21760
10.3390/molecules17033008
1420-3049
eng
https://doi.org/10.3390/molecules17033008
open access
© 2012 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/)
MDPI
oai:minerva.usc.es:10347/219822023-07-10T06:12:02Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents?
Carrera Fernández, Paula
Campo, Riccardo
Méndez Pampín, Ramón José
Di Bella, Gaetano
Campos Gómez, José Luis
Mosquera Corral, Anuska
Val del Río, María Ángeles
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Aerobic granular sludge
Fish canning wastewater
Nutrients removal
Salinity
AOB
The development and stability of aerobic granular sludge (AGS) was studied in two Sequencing Batch
Reactors (SBRs) treating fish canning wastewater. R1 cycle comprised a fully aerobic reaction phase, while
R2 cycle included a plug-flow anaerobic feeding/reaction followed by an aerobic reaction phase. The performance of the AGS reactors was compared treating the same effluents with variable salt concentrations
(4.97e13.45 g NaCl/L) and organic loading rates (OLR, 1.80e6.65 kg CODs/(m3
$d)). Granulation process was
faster in R2 (day 34) than in R1 (day 90), however the granular biomass formed in the fully aerobic
configuration was more stable to the variable feeding composition. Thus, in R1 solid retention times (SRT),
up to 15.2 days, longer than in R2, up to 5.8 days, were achieved. These long SRTs values helped the retention
of nitrifying organisms and provoked the increase of the nitrogen removal efficiency to 80% in R1 while it
was approximately of 40% in R2. However, the presence of an anaerobic feeding/reaction phase increased
the organic matter removal efficiency in R2 (80e90%) which was higher than in R1 with a fully aerobic
phase (75e85%). Furthermore, in R2 glycogen-accumulating organisms (GAOs) dominated inside the
granules instead of phosphorous-accumulating organisms (PAOs), suggesting that GAOs resist better the
stressful conditions of a variable and high-saline influent. In terms of AGS properties an anaerobic feeding/
reaction phase is not beneficial, however it enables the production of a better quality effluent
2020-05-04
2020-05-04
2019
journal article
Carrera, P., Campo, R., Méndez, R. et al. (2019). Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents?. Chemosphere 226, 865-873. doi: 10.1016/j.chemosphere.2019.03.127
0045-6535
http://hdl.handle.net/10347/21982
10.1016/j.chemosphere.2019.03.127
1879-1298
eng
https://doi.org/10.1016/j.chemosphere.2019.03.127
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO%2FRECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2014-55397-JIN/ES/DESARROLLO DE SISTEMAS SOSTENIBLES BASADOS EN BIOMASA GRANULAR PARA EL TRATAMIENTO DE AGUAS RESIDUALES PROCEDENTES DE LA INDUSTRIA DE PRODUCTOS DEL MAR
https://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 The Authors. Open Access. Published by Elsevier Ltd. This article is available under the Creative Commons CC-BY-NC-ND license and permits non-commercial use of the work as published, without adaptation or alteration provided the work is fully attributed
Elsevier
oai:minerva.usc.es:10347/224052020-05-20T02:01:30Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Modeling photosynthetically active radiation from satellite-derived estimations over mainland Spain
Vindel, José M.
Valenzuela, Rita X.
Navarro, Ana A.
Zarzalejo, Luis F.
Paz Gallardo, Abel
Souto González, José Antonio
Méndez Gómez, Ramón
Cartelle Fernández, David
Casares Long, Juan José
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Photosynthetically active radiation
Global horizontal irradiance
Clustering analysis
Kato bands
A model based on the known high correlation between photosynthetically active radiation (PAR) and global horizontal irradiance (GHI) was implemented to estimate PAR from GHI measurements in this present study. The model has been developed using satellite-derived GHI and PAR estimations. Both variables can be estimated using Kato bands, provided by Satellite Application Facility on Climate Monitoring (CM-SAF), and its ratio may be used as the variable of interest in order to obtain the model. The study area, which was located in mainland Spain, has been split by cluster analysis into regions with similar behavior, according to this ratio. In each of these regions, a regression model estimating PAR from GHI has been developed. According to the analysis, two regions are distinguished in the study area. These regions belong to the two climates dominating the territory: an Oceanic climate on the northern edge; and a Mediterranean climate with hot summer in the rest of the study area. The models obtained for each region have been checked against the ground measurements, providing correlograms with determination coefficients higher than 0.99
2020-05-19
2020-05-19
2018
journal article
Vindel, J.M.; Valenzuela, R.X.; Navarro, A.A.; Zarzalejo, L.F.; Paz-Gallardo, A.; Souto, J.A.; Méndez-Gómez, R.; Cartelle, D.; Casares, J.J. Modeling Photosynthetically Active Radiation from Satellite-Derived Estimations over Mainland Spain. Remote Sens. 2018, 10, 849
http://hdl.handle.net/10347/22405
10.3390/rs10060849
2072-4292
eng
https://doi.org/10.3390/rs10060849
http://creativecommons.org/licenses/by/4.0/
open access
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
MDPI
oai:minerva.usc.es:10347/216182020-04-22T02:02:04Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Application of aqueous two phase systems based on polyethylene glycoland sodium citrate for the recovery of phenolic compounds from eucalyptus wood
Xavier Saavedra, Ana Lucía
Freire Leira, María Sonia
Vidal Tato, María Isabel
González Álvarez, Julia
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Aqueous two-phase systems
Biomass wastes
Eucalyptus wood
Natural antioxidants
Polyethylene glycol
Sodium citrate
This paper proposes an alternative way to intensify the exploitation of Eucalyptus wood wastes before valorisation for energy production. An aqueous two-phase system (ATPS) based on PEG 2000 and sodium citrate was investigated for the recovery of phenolic compounds that could act as natural antioxidants for applications including cosmetics, pharmaceuticals, food additives and other industrial applications. The influence of the tie line length (TLL) (26,1-46,1%), extraction temperature (25-65ºC), extraction time (90-390 min) and phase settlement time (1-8 h) were studied. Phenolic compounds were concentrated preferentially in the PEG-rich phase. A partition coefficient of 38 and a total phenols yield of 1,29 mg gallic acid equivalent/100 mg wood dry basis were obtained under the operational conditions selected: TLL, 46,1%, temperature 65ºC, extraction time 90 min and settlement time 1 h. Analysis of the extracts by RP-HPLC-ESI-TOF confirmed the presence of various phenolic compounds with demonstrated antioxidant activity: monogalloyl glucose, (-)-gallic acid, ellagic acid and quercetin 3-O-rhamnoside
2020-04-21
2020-04-21
2015
journal article
Xavier, L. Freire Leira, M.S., Vidal Tato, M.I. y González Álvarez, J. (2015). Application of aqueous two phase systems based on polyethylene glycoland sodium citrate for the recovery of phenolic compounds from eucalyptus wood. "Maderas. Ciencia y tecnología", vol. 17 (2), 342-354
0718-221X
http://hdl.handle.net/10347/21618
10.4067/S0718-221X2015005000032
eng
https://doi.org/10.4067/S0718-221X2015005000032
https://creativecommons.org/licenses/by-nc/4.0/deed.en
open access
This work is licensed under a Creative Commons Attribution License
Universidad Bio-Bio
oai:minerva.usc.es:10347/329782024-03-21T09:21:42Zcom_10347_2988com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888com_10347_2927com_10347_2891col_10347_11762col_10347_12262col_10347_12292
The underlying order: Isomerism as a blueprint to control the behavior of sugar-based (bio)surfactants
Sánchez Fernández, Adrián
Poon, Jia-Fei
Universidade de Santiago de Compostela. Centro de Investigación en Química Biolóxica e Materiais Moleculares
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Departamento de Química Orgánica
Biosurfactants
Isomerism
Self-assembly
Rheology
Supramolecular assembly
Surfactants are ubiquitous in formulated products and technologies. As one of the most important commodity chemicals, their remarkable consumption leads to the necessity of finding sustainable alternatives. Although the use of renewable sources limits the available chemical space for a “Green” production, the great variety of naturally occurring precursors, i.e., fatty acids and sugars, opens a myriad of possibilities to create biosurfactants capable of replacing the fatigued fossil-derived amphiphiles. Here, we visit the concept of isomer-directed assembly applied to sugar-based surfactants, wherein amphiphile assembly and function are fine-tuned through changes in the stereochemical and regiochemical configuration of the molecule. As such, we show how isomerism defines directional interactions and solvation, ultimately dictating the assembly of surfactants. However, a general framework to understand the structure-function relationship for these is still missing, which is key to realizing this divergent set of tools for the design of new surfactants
2024-03-04
2024-03-04
2024
journal article
Current Opinion in Colloid & Interface Science, Volume 69, 2024, 101768
1359-0294
http://hdl.handle.net/10347/32978
10.1016/j.cocis.2023.101768
eng
https://doi.org/10.1016/j.cocis.2023.101768
http://creativecommons.org/licenses/by/4.0/
open access
© 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons. org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/203912023-07-10T06:17:14Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Carbon footprint and nutritional quality of different human dietary choices
González García, Sara
Esteve Llorens, Xavier
Moreira Vilar, María Teresa
Feijoo Costa, Gumersindo
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Diet
Greenhouse gases emission
Healthy diet
Life Cycle Assessment
NRD9.3
Sustainable diet
Apart from industrial activities, our eating habits also have a significant environmental cost associated with crop cultivation, manufacturing processes, packaging, refrigeration, transport cooking and waste management. In a context of growing social awareness of the role of different dietary choices in the environment, the review of different alternatives on the road to a healthy and sustainable diet should integrate relevant information on the nutritional quality of different eating habits. Since dietary choices have an effect on environmental sustainability and human health, a literature review on different dietary choices has been conducted to determine the differences in carbon footprint and nutritional quality identifying the main hotspots trying to give advice towards the identification of sustainable diets. After applying a set of criteria for reference selection, 21 peer-reviewed studies have been analysed in detail, allowing the comparison of 66 dietary scenarios.
We identified that the so-called Mediterranean and Atlantic diets present high nutritional scores and low carbon footprints. On the contrary, the dietary choices identified in northern and Western Europe, as well as in the United States, have the highest carbon footprints, highlighting the contribution of dairy products as a basic source of high-quality nutrients and protein. Broadly speaking, dietary choices rich in vegetables (e.g., vegan, vegetarian as well as Indian and Peruvian) have a better environmental profile than those rich in meat (mainly ruminant meat). In line with these findings, the shift in meat consumption habits from beef and veal to chicken, pork and poultry, the introduction of alternative foods to animal protein (e.g. quinoa) and the consumption of olive oil as a major source of vegetable oil may be compatible with a healthier and more environmentally friendly diet. However, the complete elimination of meat and dairy products from the daily diet may not be feasible in case the supply of some micronutrients (e.g., calcium and vitamin D) is not guaranteed. Limitations were identified in the consulted studies related to the consideration of the different system boundaries, as well as underlying uncertainties related to data sources. Therefore, efforts should be made to develop consistent and agreed-upon methods for estimating both the carbon footprint and nutritional quality scores
2019-12-05
2020-07-04
2018-12-10
journal article
González-García, S., Esteve-Llorens, X., Moreira, M., & Feijoo, G. (2018). Carbon footprint and nutritional quality of different human dietary choices. Science Of The Total Environment, 644, 77-94. doi: 10.1016/j.scitotenv.2018.06.339
0048-9697
http://hdl.handle.net/10347/20391
10.1016/j.scitotenv.2018.06.339
eng
https://doi.org/10.1016/j.scitotenv.2018.06.339
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2014-14984/ES/
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2018 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/317512024-01-06T01:03:01Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Rheological Properties of Corn Starch Gels With the Addition of Hydroxypropyl Methylcellulose of Different Viscosities
Moreira Martínez, Ramón Felipe
Montes, Leticia
Rosell, Cristina M.
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Average viscosimetric weight
creep and recovery
gelatinization
intrinsic viscosity
viscoelasticity
The objective of this study is to determine the effect of the addition of hydroxypropyl methylcellulose (HPMC) (from 0.5 to 2.0% w/w, starch basis) with three different viscosities (40–60, 80–120, and 2,600–5,600 mPa⋅s) to corn starch (30% w/w, total basis) gels. Average viscosimetric molecular weights (Mv) of tested HPMC were determined (from 27.2 × 103 to 82.7 × 103 g/mol). Water retention capacity of HPMC varied linearly with Mv. The formation and curation of gels were monitored by rheology employing consecutive steps such as heating ramp (25–90°C), time sweep (90°C), cooling ramp (90–25°C), time sweep (25°C), and frequency sweep. Additionally, creep-recovery tests were performed. HPMC above 1.5% w/w delayed the range of gelatinization temperature of starch up to 2°C. Viscoelasticity and stiffness of corn starch gels with HPMC depend on both the amount of polymer added and Mv of the HPMC. Finally, to achieve corn gels with mimetic viscoelastic properties to wheat gel (with constant total solids), HPMC with relatively low viscosity (low Mv) is necessary to be added at certain content.
2024-01-05
2024-01-05
2022-03-22
journal article
Moreira, R., Montes, L., Rosell C.M. (2022). Rheological Properties of Corn Starch Gels With the Addition of Hydroxypropyl Methylcellulose of Different Viscosities, "Frontiers in Nutrition", Vol. 9, 1-10
http://hdl.handle.net/10347/31751
10.3389/fnut.2022.866789
eng
https://doi.org/10.3389/fnut.2022.866789
2018-095919
http://creativecommons.org/licenses/by/4.0/deed.gl
open access
©2022 Montes, Rosell and Moreira. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).
Frontiers
oai:minerva.usc.es:10347/290732022-08-29T11:23:21Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Co-benefits of the EAT-Lancet diet for environmental protection in the framework of the Spanish dietary pattern
Cambeses Franco, Cristina
Moreira Vilar, María Teresa
González García, Sara
Feijoo Costa, Gumersindo
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Water footprint
Carbon footprint
Sustainable healthy diet
Spanish eating habits
Dietary recommendations
The immediate need to build resilient food systems with lower greenhouse gas (GHG) emissions and protection of water resources is a global challenge. To address this, the EAT-Lancet Commission described the global reference diet with principles of nutritional quality and environmental sustainability. With this in mind, the carbon and water footprints of the current Spanish dietary pattern have been compared with the EAT-Lancet global dietary recommendations, taking into account deviations in food intake. To provide additional context, differences between the average Spanish dietary pattern and dietary guidelines applied in other countries in Europe (Italy, the Netherlands and the Mediterranean region) and America have also been analyzed and discussed from a sustainability approach. We found that the EAT-Lancet diet requires less water resources (3056 L·person−1·day−1) and lower level of GHG emissions (2.13 kgCO2eq·person−1·day−1) in comparison with the Spanish dietary pattern (3732 L·person−1·day−1 and 3.62 kgCO2eq·person−1·day−1, respectively). Starch-based products and oils and fats were identified as largest contributors to both environmental indicators in the EAT-Lancet diet. On the other hand, meat and dairy were the environmental hotspots in the Spanish dietary pattern. Comparison with other food-based dietary patterns also raises environmental concerns about the high meat consumption in Spain. Overall, this analysis suggests that reducing the consumption of beef meat and dairy to a level in line with the global environmental targets set by the EAT-Lancet Commission would ensure a shift in Spanish dietary habits towards more environmentally sustainable food consumption patterns
2022-08-17
2022-08-17
2022
journal article
Science of The Total Environment 836 (2022) 155683
http://hdl.handle.net/10347/29073
10.1016/j.scitotenv.2022.155683
0048-9697
eng
https://doi.org/10.1016/j.scitotenv.2022.155683
http://creativecommons.org/licenses/by-nc/4.0/
open access
©2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/)
Atribución-NoComercial 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/270402023-07-10T06:10:57Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Integrated biocatalytic platform based on aqueous biphasic systems for the sustainable oligomerization of rutin
Muñiz Mouro, Abel
Ferreira, Ana M.
Coutinho, João A. P.
Freire, Mara
Tavares, Ana Paula Mora
Gullón Estévez, Patricia
González García, Sara
Eibes González, Gemma María
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Separation science
Alcohols
Peptides and proteins
Oligomerization
Filtration
Rutin oligomerization
Organic-free
Biocompatible
Laccase reuse
Aqueous biphasic system
Life-cycle assessment
Rutin is a known antioxidant compound that displays a broad range of biological activities and health-related benefits but presents a low water solubility that can be overcome by its polymerization. In this work, biocompatible aqueous biphasic systems composed of the ionic liquid cholinium dihydrogen phosphate ([CH][DHph]) and the polymer poly(ethylene glycol) 600 (PEG 600) were investigated as an efficient integrated reaction–separation platform for the laccase-catalyzed oligomerization of rutin. Two different approaches were studied to reuse laccase in several oligorutin production cycles, the main difference between them being the use of monophasic or biphasic regimes during the oligomerization reaction. The use of a biphasic regime in the second approach (heterogeneous reaction medium) allowed the successful reuse of the biocatalyst in three consecutive reaction–separation cycles while achieving noteworthy rutin oligomerization yields (95% in the first cycle, 91% in the second cycle, and 89% in the last cycle). These remarkable results were caused by the combination of the increased solubility of rutin in the PEG-rich phase together with the enhanced catalytic performance of laccase in the [Ch][DHph]-rich phase, alongside with the optimization of the pH of the reaction medium straightly linked to enzyme stability. Finally, a life-cycle assessment was performed to compare this integrated reaction–separation platform to three alternative processes, reinforcing its sustainability
2021-10-28
2021-10-28
2021
journal article
ACS Sustainable Chem. Eng. 2021, 9, 29, 9941–9950
http://hdl.handle.net/10347/27040
10.1021/acssuschemeng.1c03399
2168-0485
eng
https://doi.org/10.1021/acssuschemeng.1c03399
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/ RTI2018-094482-J-I00/ES/SINTESIS BIOCATALITICA DE OLIGOFLAVONOIDES HIDROXILADOS
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 American Chemical Society. This article is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/deed.en)
Atribución 4.0 Internacional
ACS
oai:minerva.usc.es:10347/232942023-07-10T06:12:24Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Towards a digital twin: a hybrid data-driven and mechanistic digital shadow to forecast the evolution of lignocellulosic fermentation
Cabaneros López, Pau
Udugama, Isuru A.
Thomsen, Sune T.
Roslander, Christian
Junicke, Helena
Mauricio Iglesias, Miguel
Gernaey, Krist V
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Real-time monitoring
Digital Twin
Lignocellulosic ethanol
kinetic models
Data-driven models
yeast fermentation
This is the peer reviewed version of the following article: Lopez, P.C., Udugama, I.A., Thomsen, S.T., Roslander, C., Junicke, H., Mauricio‐Iglesias, M. and Gernaey, K.V. (2020), Towards a digital twin: a hybrid data‐driven and mechanistic digital shadow to forecast the evolution of lignocellulosic fermentation. Biofuels, Bioprod. Bioref., 14: 1046-1060. doi:10.1002/bbb.2108, which has been published in final form at https://doi.org/10.1002/bbb.2108. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
The high substrate variability and complexity of fermentation media derived from lignocellulosic feedstocks affect the concentration profiles and the length of the fermentations. Not accounting for such variability raises operational and scheduling issues and affects the overall performance of these processes. In this work, a hybrid soft sensor was developed to monitor and forecast the evolution of cellulose-to-ethanol fermentations. The soft sensor consisted of two modules (a data-driven and a kinetic model) connected sequentially. The data-driven module used a partial-least-squares model to estimate the current state of glucose from spectroscopic data. The kinetic model was recursively fit to the known concentrations of glucose to update the long-horizon predictions of glucose, xylose and ethanol. This combination of real-time data update from an actual fermentation process to a high fidelity kinetic model constitutes the basis of the digital twin concepts and allows for the better real-time understanding of complex inhibition phenomena caused by different inhibitors commonly found in lignocellulosic feedstocks. The soft sensor was experimentally validated with three different cellulose-to-ethanol fermentations and the results suggested that this method is suitable to monitor and forecast fermentations when the measurements provide reasonably good estimates of the real states of the system. These results would allow increasing the flexibility of the operation of cellulosic processes and adapting the scheduling to the inherent variability of such substrates.
2020-09-25
2021-03-13
2020
journal article
Lopez, P.C., Udugama, I.A., Thomsen, S.T., Roslander, C., Junicke, H., Mauricio‐Iglesias, M. and Gernaey, K.V. (2020), Towards a digital twin: a hybrid data‐driven and mechanistic digital shadow to forecast the evolution of lignocellulosic fermentation. Biofuels, Bioprod. Bioref., 14: 1046-1060. doi:10.1002/bbb.2108
http://hdl.handle.net/10347/23294
1932-1031
eng
https://doi.org/10.1002/bbb.2108
info:eu-repo/grantAgreement/EC/H2020/713683
open access
© 2020 Society of Chemical Industry and John Wiley & Sons, Ltd. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
Wiley
oai:minerva.usc.es:10347/187922021-07-29T08:06:09Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Energetic and economic assessment of sludge thermal hydrolysis in novel wastewater treatment plant configurations
Taboada Santos, Antón
Lema Rodicio, Juan Manuel
Carballa Arcos, Marta
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anaerobic digestion
Economy of scale
Energy autarky
High-rate activated sludge
Payback time
Sludge disposal
Novel wastewater treatment plants (WWTPs) are aimed to be more energetically efficient than conventional ones. Their first step is a chemical oxygen demand (COD) preconcentration stage with different alternatives, such as rotating belt filters (RBF), chemically enhanced primary treatment (CEPT), high-rate activated sludge (HRAS), or combinations thereof, in which energy requirements are substantially reduced. The COD recovered as sludge allows a noticeable increase of biogas production in anaerobic digestion (AD). In conventional WWTPs, sludge anaerobic biodegradability can be significantly enhanced by applying sludge pretreatment methods, such as thermal hydrolysis (TH), before AD. However, considering that novel-sludges are more anaerobically biodegradable than conventional ones, the impact of TH on their methane production is expected to result significantly lower. In this study, an energetic and economic assessment of applying TH in novel WWTPs was performed. We found that TH is only justified to reduce operational costs as long as sludge TS concentration in the feeding to the TH unit is higher than 1-2%. The HRAS is the scenario that leads to the lowest treatment costs (below 1 c€/m3 wastewater if sludge is thickened over 10% of TS). However, the WWTP based on CEPT for COD preconcentration leads to the lowest electricity consumption (below 0.01 kWh/m3 of wastewater), but even in the most favourable conditions the energy autarky was not achievable. Results show that the main impact of TH is mainly due to sludge disposal savings (270,000-430,000 €/year for a 500,000 inhabitants WWTP) rather than the increase of energy production (achieves maximum savings of 35,000-60,000 €/year). Payback time is very dependent on the WWTP size, ranging from 15 to 30 years for a 100,000 inhabitants WWTP and from 2 to 4 years for a 1,000,000 inhabitants WWTP
2019-05-21
2021-05-09
2019-06-01
journal article
Taboada-Santos, A., Lema, J., & Carballa, M. (2019). Energetic and economic assessment of sludge thermal hydrolysis in novel wastewater treatment plant configurations Waste Management, 92 30- 38. doi: https://doi.org/10.1016/j.wasman.2019.05.003
0956-053X
http://hdl.handle.net/10347/18792
10.1016/j.wasman.2019.05.003
eng
https://doi.org/10.1016/j.wasman.2019.05.003
https://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© Elsevier 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (https://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/208892023-07-10T06:12:36Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Model-based design of smart active packaging systems with antimicrobial activity
Vilas, Carlos
Mauricio Iglesias, Miguel
García, Miriam R.
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Smart active packaging
Model-based optimal design
Predictive microbiology
Antimicrobial activity
Fish freshness
Shelf life
Smart active packaging is an innovative packaging system that combines the benefits of measuring, estimating or predicting different aspects of food quality or safety with the release of an active substance that extends product shelf life. Nevertheless, in its typical configuration, the active packaging and the smart packaging are not connected, and the information provided is not exploited to design the release of the active substance.
In this work, we demonstrate how smart active packaging systems using predictive mathematical models allow the automatic optimisation of food packaging design and the prediction of the expected shelf life along the food chain. On the one hand, the system calculates the best design of the active packaging and the concentration
of the active substance in the different layers that maximise food quality and safety. On the other hand, the model allows to calculate and update shelf life values along the food chain under unexpected changes in the storage conditions. Shelf life estimations and prediction will help distributors and sellers to adjust the product market prices. For example, prices can be lowered to avoid food losses when the product is close to its use-by
date.
Hake (Merluccius merluccius) represents an example of a highly relevant and perishable food that can be conserved using natural antimicrobials. Therefore, the case study selected to illustrate the proposed methodology consists of the smart active packaging of hake using carvacrol as the active substance (antimicrobial). Besides, different polymers are considered as possible active packaging materials. The Matlab™ codes required to perform the simulations of the models described in this work as well as the optimisations for packaging design are available at https://doi.org/10.5281/zenodo.3244153
2020-03-24
2021-03-03
2020-06
journal article
Vilas, C., Mauricio-Iglesias, M., & García, M. (2020). Model-based design of smart active packaging systems with antimicrobial activity. Food Packaging And Shelf Life, 24, 100446. doi: 10.1016/j.fpsl.2019.100446
2214-2894
http://hdl.handle.net/10347/20889
10.1016/j.fpsl.2019.100446
eng
https://doi.org/10.1016/j.fpsl.2019.100446
info:eu-repo/grantAgreement/EC/H2020/723575
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/291002023-07-10T06:10:56Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Simplified engineering design towards a competitive lipid-rich effluents valorization
Argiz Montes, Lucía
Val del Río, María Ángeles
Correa Galeote, David
Rodelas González, Belén
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Bioprocess
Mixed microbial culture
Triacylglyceride
Polyhydroxyalkanoate
Waste lipids
Medium- and long-chain fatty acids and glycerol contained in the oily fraction of many food-industry effluents are excellent candidates to produce biobased high-value triacylglycerides (TAGs) and polyhydroxyalkanoates (PHAs). The typical process configuration for TAGs recovery from lipid-rich streams always includes two steps (culture enrichment plus storage compounds accumulation) whereas, for PHAs production, an additional pretreatment of the substrate for the obtainment of soluble volatile fatty acids (VFAs) is required. To simplify the process, substrate hydrolysis, culture enrichment, and accumulation (TAG and PHA storage) were coupled here in a single sequencing batch reactor (SBR) operated under the double growth limitation strategy (DGL) and fed in pulses with industrial waste fish oil during the whole feast phase. When the SBR was operated in 12 h cycles, it was reached up to 51 wt % biopolymers after only 6 h of feast (TAG:PHA ratio of 50:51; 0.423 CmmolBIOP/CmmolS). Daily storage compound production was observed to be over 25% higher than the reached when enrichment and accumulation stages were carried in separate operational units. Increasing the feast phase length from 6 to 12 h (18 h cycle) negatively affected the DGL strategy performance and hence system storage capacity, which was recovered after also extending the famine phase in the same proportion (24 h cycle). Besides, the carbon influx during the feast phase was identified as a key operational parameter controlling storage compounds production and, together with the C/N ratio, culture selection. The different cycle configurations tested clearly modulated the total fungal abundances without no significant differences in the size of the bacterial populations. Several PHA and TAG producers were found in the mixed culture although the PHA and TAG productions were poorly associated with the increased relative abundances (RAs) of specific operational taxonomic units (OTUs)
2022-08-19
2022-08-19
2022
journal article
Journal of Environmental Management 317 (2022) 115433
http://hdl.handle.net/10347/29100
10.1016/j.jenvman.2022.115433
0301-4797
eng
https://doi.org/10.1016/j.jenvman.2022.115433
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO%2FRECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by- nc/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/276832022-03-19T03:02:24Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Revising concepts on liquid–liquid extraction: data treatment and data reliability
Arce Arce, Alberto
Arce Ceinos, Alberto
Rodríguez Figueiras, Óscar
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Mixtures
Liquids
Equilibrium
Liquid liquid equilibrium
Molecules
The intention of this article is to clarify some concepts and relevant aspects of the experimental determination and treatment of liquid–liquid equilibrium data for ternary systems. Distinction is made between solubility curve and binodal curve, setting the stability limit which is defined by the spinodal curve. In addition, it is recommended to carry out the equilibrium data correlation using semiempirical models with a thermodynamic base, over the use of empirical equations. Moreover, the misuse of these empirical equations (Hand, Bachman, Othmer-Tobias, etc.) as proof of data quality or consistency is clarified
2022-03-18
2022-03-18
2021
journal article
J. Chem. Eng. Data 2022, 67, 1, 286–296
0021-9568
http://hdl.handle.net/10347/27683
10.1021/acs.jced.1c00778
1520-5134
eng
https://doi.org/10.1021/acs.jced.1c00778
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 American Chemical Society. This article is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/deed.en)
Atribución 4.0 Internacional
ACS Publications
oai:minerva.usc.es:10347/158032023-07-10T06:13:00Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?
Longo, Stefano
Frison, Nicola
Renzi, Daniele
Fatone, Francesco
Hospido Quintana, Almudena
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Short cut enhanced nutrient abatement (SCENA)
Side-stream treatment
Life cycle analysis (LCA)
Life cycle cost (LCC)
Monte carlo analysis
Sludge phosphorus availability
The environmental and economic benefits and burdens of including the first Short Cut Enhanced Nutrient Abatement (SCENA) into a real municipal wastewater treatment plant were evaluated using life cycle assessment (LCA) and life cycle cost (LCC). The implications of accomplishing nitrogen (N) removal and phosphorus (P) recovery via nitrite in the side stream were assessed taking into account the actual effluent quality improvement, the changes in the electricity and chemical consumption, N2O, CO2 and CH4 emissions and the effects of land application of biosolids, among others. In addition, a case-specific estimation of the P availability when sludge is applied to land, therefore replacing conventional fertilizer, was performed. Furthermore, to account for the variability in input parameters, and to address the related uncertainties, Monte Carlo simulation was applied.
The analysis revealed that SCENA in the side stream is an economic and environmentally friendly solution compared to the traditional plant layout with no side-stream treatment, thanks to the reduction of energy and chemical use for the removal of N and P, respectively. The uncertainty analysis proved the validity of the LCA results for global warming potential and impact categories related to the consumption of fossil-based electricity and chemicals, while robust conclusions could not be drawn on freshwater eutrophication and toxicity-related impact categories. Furthermore, three optimization scenarios were also evaluated proving that the performance of the WWTP can be further improved by, for instance, substituting gravitational for mechanical thickening of the sludge or changing the operational strategy to the chemically enhanced primary treatment, although this second alternative will increase the operational cost by 5%. Finally, the outcomes show that shifting P removal from chemical precipitation in the main line to biologically enhanced uptake in the side stream is key to reducing chemicals use, thus the operational cost, and increasing the environmental benefit of synthetic fertilizers replacement
2017-09-26
2019-09-06
2017-09-06
journal article
LONGO, STEFANO, FRISON, NICOLA, RENZI, DANIELE, FATONE, FRANCESCO and HOSPIDO, ALMUDENA, 2017, Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?. Water Research. 2017. Vol. 125, p. 478-489. DOI 10.1016/j.watres.2017.09.006. Elsevier BV
0043-1354
http://hdl.handle.net/10347/15803
10.1016/j.watres.2017.09.006
1879-2448
eng
https://doi.org/10.1016/j.watres.2017.09.006
info:eu-repo/grantAgreement/EC/H2020/690323
info:eu-repo/grantAgreement/EC/H2020/649819
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2017 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Elsevier BV
oai:minerva.usc.es:10347/276442023-07-10T06:11:08Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Enzymatic cometabolic biotransformation of organic micropollutants in wastewater treatment plants: a review
Kennes Veiga, David Manuel
González Gil, Lorena
Carballa Arcos, Marta
Lema Rodicio, Juan Manuel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Cometabolism
Enzymes
Omics
Pharmaceuticals
Transformation products
Biotransformation of trace-level organic micropollutants (OMPs) by complex microbial communities in wastewater treatment facilities is a key process for their detoxification and environmental impact reduction. Therefore, understanding the metabolic activities and mechanisms that contribute to their biotransformation is essential when developing approaches aiming to minimize their discharge. This review addresses the relevance of cometabolic processes and discusses the main enzymatic activities currently known to take part in OMPs removal under different redox environments in the compartments of wastewater treatment plants. Furthermore, the most common methodologies to decipher such enzymes are discussed, including the use of in vitro enzyme assays, enzymatic inhibitors, the analysis of transformation products and the application of several -omic techniques. Finally, perspectives on major challenges and future research requirements to improve OMPs biotransformation are proposed
2022-03-14
2022-03-14
2022
journal article
Bioresource Technology 344 (2022) 126291. https://doi.org/10.1016/j.biortech.2021.126291
http://hdl.handle.net/10347/27644
10.1016/j.biortech.2021.126291
0960-8524
eng
https://doi.org/10.1016/j.biortech.2021.126291
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-110346RB-C21/ES/ANALISIS DE LA RESISTENCIA A ANTIBIOTICOS Y SU BIOTRANSFORMACION EN PLANTAS INNOVADORAS QUE PROMUEVEN LA RECUPERACION DE CARBONO LINEA DE AGUAS
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/157402023-07-10T06:13:09Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Effect of Coagulant-Flocculant Reagents on Aerobic Granular Biomass
Val del Río, María Ángeles
Morales Pereira, Nicolás
Figueroa Leiro, Mónica
Mosquera Corral, Anuska
Campos Gómez, José Luis
Méndez Pampín, Ramón José
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Aerobic granule
Coagulant
Flocculant
SOUR
Organic matter
Nitrogen
This is the post-print reviewed version of the following article: Val del Río, A., Morales, N., Figueroa, M., Mosquera-Corral, A., Campos, J.L., Méndez, R. 2012. Effect of coagulant-flocculant reagents on aerobic granular biomass. Journal of Chemical Technology and Biotechnology, 87(7), 908-913, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/jctb.3698/full. This article may be used for non-commercial purposes
BACKGROUND: Technologies based on aerobic granular biomass are presented as a new alternative for its application to the wastewater treatment due to its advantages in comparison with the conventional activated sludge ones. However the properties of the aerobic granules can be influenced by the presence of residual amounts of coagulant-flocculant reagents, frequently used as pre-treatment before the biological process. In this work the effect of these compounds on aerobic granular biomass development was tested.
RESULTS: The presence of coagulant-flocculant reagents led to a worse biomass retention capacity with a lower VSS concentration compared to a control reactor (4.5 vs. 7.9 g VSS/L) and with a higher SVI (70 vs. 40 mL/g TSS) and diameter (5.0 vs. 2.3 mm). These reagents also caused a decrease in the maximum oxygen consumption rate, but the removal efficiencies of organic matter (90%) and nitrogen (60%) achieved were similar than the control reactor.
CONCLUSION: The continuous presence of residual levels of coagulant-flocculant reagents from the pre-treatment unit negatively affected the formation process and the physical properties of the aerobic granules, however the removal of organic matter and nitrogen were not affected
2017-08-14
2017-08-14
2012
journal article
Val del Río, A., Morales, N., Figueroa, M., Mosquera-Corral, A., Campos, J. L., & Méndez, R. (2012). Effect of coagulant-flocculant reagents on aerobic granular biomass. [Article]. Journal of Chemical Technology and Biotechnology, 87(7), 908-913. doi: 10.1002/jctb.3698
1097-4660
http://hdl.handle.net/10347/15740
10.1002/jctb.3698
eng
http://dx.doi.org/10.1002/jctb.3698
info:eu-repo/grantAgreement/MEC/Plan Nacional de I+D+i 2004-2007/CSD2007-00055/ES/Concepción de la EDAR del siglo XXI. Desarrollo, implementación y evaluación de tecnologías para el tratamiento y recuperación de recursos en aguas residuales
info:eu-repo/grantAgreement/MICINN/Plan Nacional de I+D+i 2008-2011/CTQ2008-06792-C02-01/ES/HACIA LA IMPLEMENTACION INDUSTRIAL DE SISTEMAS DE BIOMASA GRANULAR AEROBIA: APLICACION A AGUAS RESIDUALES INDUSTRIALES Y URBANAS
open access
© 2012 Society of Chemical Industry
John Wiley & Sons
oai:minerva.usc.es:10347/201702023-07-10T06:17:42Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Environmental implications of biohydrogen based energy production from steam reforming of alcoholic waste
Cortés Montoya, Antonio José
Feijoo Costa, Gumersindo
Chica Lara, Antonio
Costa Serra, Javier Francisco da
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Alcoholic waste
Environmental profile
LCA
SOFC
Biohydrogen
Nowadays, there is an increasing demand for energy in the world. With an energy system still based on fossil fuels, a paradigm shifts towards clean energy production based on available renewable resources is necessary. Hydrogen is a high-quality energy carrier that can be used with great efficiency and is expected to acquire a great importance in the next generation of fuels. This study aims to analyze the potential environmental impacts associated with the steam reforming of alcoholic waste from distilleries to produce clean electricity by using the Life Cycle Assessment methodology. The main findings from this study reported that the global environmental profile is better than other alternatives more common as sanitary landfill or incineration. In terms of some impact categories as Abiotic and Ozone Depletion, Acidification and Eutrophication, steam reforming of alcoholic waste performed better profiles than other processes that produce hydrogen from diverse feedstocks
2019-10-31
2021-06-08
2019-10-05
journal article
Cortés, A., Feijoo, G., Chica, A., Da Costa-Serra, J., & Moreira, M. (2019). Environmental implications of biohydrogen based energy production from steam reforming of alcoholic waste. Industrial Crops And Products, 138, 111465. doi: 10.1016/j.indcrop.2019.111465
0926-6690
http://hdl.handle.net/10347/20170
10.1016/j.indcrop.2019.111465
eng
https://doi.org/10.1016/j.indcrop.2019.111465
info:eu-repo/grantAgreement/EC/H2020/727740
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/294872022-12-01T03:02:40Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227com_10347_2930com_10347_2891col_10347_12262col_10347_11711
A proteomic approach to identify biomarkers of foal meat quality: A focus on tenderness, color and intramuscular fat traits
López Pedrouso, María Dolores
Lorenzo Rodríguez, José Manuel
Cittadini, Aurora
Sarries Martínez, María Victoria
Gagaoua, Mohammed
Franco Ruiz, Daniel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Departamento de Zooloxía, Xenética e Antropoloxía Física
Horse
Finishing diet
Omics
Muscle proteins
Energy metabolism
Response to stress
Biochemical pathways
Foal meat is considered a healthy alternative to other meat sources and more environmentally sustainable. However, its quality is highly variable and there is lack of knowledge about the molecular mechanisms underlying its determination. Genotype and diet play a relevant role as the main factors that can allow a control of the final quality and the use of high-throughput analytical methods such as proteomics is a way to achieve this lofty goal. This research aimed to study-two breeds (Burguete and Jaca Navarra) supplemented with two different finishing diets: conventional concentrate and straw (C) vs silage and organic feed (S). The proteomic approach built a library of 294 proteins that were subjected to several statistical and bioinformatic analyses. Burguete breed finished with concentrate produced higher meat quality in terms of tenderness, intramuscular fat and color lightness mainly due to the high abundance of energy metabolic proteins. Tenderness was correlated to myofibrillar proteins (ACTA1, MYBPH, MYL1 and TNNC1) and energy metabolic proteins (ALDOA, CKM, TPI1 and PGMA2). Regarding color, the main pathways were energy metabolism, involving several glycolytic enzymes (ALDOA, PKM, PFKM and CKM). Oxidative stress and response to stress proteins (HSPA1A, SOD2 and PRDX2) were further involved in color variation. Moreover, we revealed that several proteins were related to the intramuscular fat accordingly to the breed. This study proposed several candidate protein biomarkers for foal meat quality that are worthy to evaluate in the future
2022-11-30
2022-11-30
2023
journal article
Food Chemistry 405 (2023) 134805
http://hdl.handle.net/10347/29487
10.1016/j.foodchem.2022.134805
0308-8146
eng
https://doi.org/10.1016/j.foodchem.2022.134805
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/276552023-07-10T06:10:58Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Open-culture biotechnological process for triacylglycerides and polyhydroxyalkanoates recovery from industrial waste fish oil under saline conditions
Argiz Montes, Lucía
González Cabaleiro, Rebeca
Correa Galeote, David
Val del Río, María Ángeles
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Lipids
Mixed microbial culture
Polyhydroxyalkanoates
Salinity
Triacylglycerides
Industrial waste fish oil streams contain high concentrations of medium and long-chain fatty acids suitable to produce value-added compounds. However, to process them dilution is required, and the water produced in the fish-canning industry commonly contains high salinity, which might limit its reuse as a dilution stream. Although NaCl is well-known to negatively affect biological activity, its effect on triacylglycerides (TAG) and polyhydroxyalkanoates (PHA) storage has not been well studied yet. Here, it was explored if intracellular TAG and PHA production can be efficient under saline conditions (10 g NaCl/L). For that purpose, waste fish oil was valorised using a mixed microbial culture (MMC) in a two-stage process (culture selection plus accumulation). Results showed that salinity influenced not only the activity but the structure of the microbial communities developed in the bioreactors. The bacterial genera Acinetobacter and Rhizobium and the mold Candida glaebosa clade were observed as the storing microorganisms which abundance increased under saline conditions whereas Dipodascus and Mortierella notably decreased. Nonetheless, despite the osmotic stress, promising results were obtained and maximum intracellular accumulations of 54.2 wt% (TAG:PHA = 28:72, 0.131 CmmolTAG/CmmolS, 0.303 CmmolPHA/CmmolS) and 50.9 wt% (TAG:PHA = 63:37, 0.291 CmmolTAG/CmmolS, 0.114 CmmolPHA/CmmolS) were observed when PHA and TAG were preferentially stored, respectively
2022-03-15
2022-03-15
2021
journal article
Separation and Purification Technology 270 (2021) 118805. https://doi.org/10.1016/j.seppur.2021.118805
http://hdl.handle.net/10347/27655
1383-5866
10.1016/j.seppur.2021.118805
eng
https://doi.org/10.1016/j.seppur.2021.118805
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO/RECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/330452024-03-21T09:21:42Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Identifying the environmental hotspots of dietary fibres extraction from chickpea hull
Rebolledo-Leiva, Ricardo
Sillero, Leyre
Moreira Vilar, María Teresa
González-García, Sara
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Legume
Waste valorisation
Life Cycle Assessment
Process simulation
Circular economy
Pursuing new sources for food production in a context of demographic growth requires achieving a sustainable production model to face the current climate crisis. The biorefinery concept emerges as a technological scheme for the integral processing of renewable resources such as food waste obtained from the processing industry. This research aims to evaluate the potential environmental impacts of the valorisation route of chickpea peel to produce dietary fibre. Coupling process modelling with life cycle assessment approaches allows designing the potential biorefinery platform and identifying factors that may restrict its application in large-scale production. Global warming, particulate matter, eutrophication and ecotoxicity-related, fossil scarcity, among others, were the impact categories analysed with a cradle-to-gate approach. Results showed, for instance, that one kilogram of dietary fibre product emits 7.62 kg CO2 eq, 14.08 g PM2.5 and 4.37 g of P eq. Furthermore, alkaline digestion and bleaching were the most impactful stages in the categories analysed, due to the use of potassium hydroxide and sodium chlorite, respectively. This research contributes to rethink chickpea hulls from the food industry as a by-product towards high value-added products with applicability in the same industry.
2024-03-07
2024-03-07
2023
journal article
Food and Bioproducts Processing Volume 142, November 2023, Pages 59-69
0960-3085
http://hdl.handle.net/10347/33045
10.1016/j.fbp.2023.09.004
eng
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2023 The Authors. Published by Elsevier Ltd on behalf of Institution of Chemical Engineers. This is an open access article under the CC BY-NC-ND license
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/250322023-07-10T06:16:27Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Cometabolic removal of organic micropollutants by enriched nitrite-dependent anaerobic methane oxidizing cultures
Martínez Quintela, Miguel
Arias Baño, Adrián
Alvariño Pereira, Teresa
Suárez Martínez, Sonia
Garrido Fernández, Juan Manuel
Omil Prieto, Francisco
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
n-damo process
Organic micropollutants
Cometabolism
Enrichment
MBR
The innovative and recently discovered n-damo process, based on anaerobic methane oxidation with nitrite, was developed in a membrane-based bioreactor and evaluated in terms of organic micropollutants (OMPs) removal. The main singularity of this study consisted in the evaluation of organic micropollutants (OMPs) removal in the biological reactor. A strategy consisting on progressively increasing the nitrogen loading rate in order to increase the specific denitrification activity was followed to check if the selected OMPs were co-metabolically biotransformed. Significant nitrite removal rate (24.1 mg N L−1 d−1) was achieved after only 30 days of operation. A maximum specific removal of 186.3 mg N gVSS−1 d−1 was obtained at the end of the operation, which is one of the highest previously reported. A successfully n-damo bacteria enrichment was achieved, being Candidatus Methylomirabilis the predominant bacteria during the whole operation attaining a maximum relative abundance of about 40 %. The natural hormones (E1 and E2) were completely removed in the bioreactor. The specific removal rates of erythromycin (ERY), fluoxetine (FLX), roxithromycin (ROX) and sulfamethoxazole (SMX) were successfully correlated with the specific nitrite removal rates, suggesting a co-metabolic biotransformation
2021-03-26
2022-07-12
2021
journal article
Journal of Hazardous Materials, 402 (2021) 123450. doi: 10.1016/j.jhazmat.2020.123450
0304-3894
http://hdl.handle.net/10347/25032
10.1016/j.jhazmat.2020.123450
eng
https://doi.org/10.1016/j.jhazmat.2020.123450
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2016-80847-R/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/290662023-07-10T06:11:34Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888com_10347_2924com_10347_2891col_10347_20715col_10347_12262col_10347_12284
Quantifying current and future raw milk losses due to bovine mastitis on European dairy farms under climate change scenarios
Guzmán Luna, Paola Margarita
Nag, Rajat
Martínez, Ismael
Mauricio Iglesias, Miguel
Hospido Quintana, Almudena
Cummins, Enda
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Departamento de Química Analítica, Nutrición e Bromatoloxía
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Food losses
Risk assessment
Pathogen infection
Predictive modelling
Stepwise probabilistic model
Staphylococcus aureus
Bovine mastitis is an infectious disease that causes udder inflammation and is responsible for raw milk losses across European dairy farms. It is associated with reduced cow milk yield and contributes to elevated Somatic Cell Count (SCC) in raw milk. Staphylococcus aureus is one of the most prevalent mastitis pathogens that cause subclinical and clinical mastitis and can be present as a coloniser bacterium in cows. Climate change and geographical variability may influence the prevalence of this pathogen. Thus, this research aimed to predict the raw milk losses in three major dairy-producing regions across Europe (i.e. Mediterranean, Atlantic and Continental) under climate change scenarios. An exposure assessment model and a stepwise probabilistic model were developed to predict potential cow milk yield reduction, S. aureus and SCC concentrations in the bulk tank milk at dairy farms. Baseline (i.e. present) and future climate change scenarios were defined, and the resultant concentrations of SCC and S. aureus were compared to the actual European regulatory limits. Across the three regions, raw milk losses ranged from 1.06% to 2.15% in the baseline. However, they increased up to 3.21% in the climate change scenarios when no on-farm improvements were considered. Regarding geographical variation, the highest potential milk losses were reported for the Mediterranean and the lowest for the Continental region. Concerning the fulfilment of the regulatory limits, the mean of S. aureus and SCC levels in milk did not exceed them either in any region or scenario. Nevertheless, when looking at percentiles, the 10th percentile remained above the limits of S. aureus in Atlantic and Mediterranean, but not in the Continental region. The findings provide a snapshot of climate change impacts on raw milk losses due to mastitis. They will allow farmers to detect weaknesses and prepare them to develop adaptation plans to climate change
2022-08-12
2022-08-12
2022
journal article
http://hdl.handle.net/10347/29066
10.1016/j.scitotenv.2022.155149
0048-9697
eng
https://doi.org/10.1016/j.scitotenv.2022.155149
info:eu-repo/grantAgreement/EC/H2020/813329
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Quantifying current and future raw milk losses due to bovine mastitis on European dairy farms under climate change scenarios
oai:minerva.usc.es:10347/276512022-11-15T11:36:13Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Identifying the sustainability route of asparagus co-product extraction: from waste to bioactive compounds
Santiago Barahona, Beatriz
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
González García, Sara
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Antioxidant
Biorefinery
Extractive agent
Life cycle assessment
Process simulation
Rutin
Rutin is a flavonol glycoside that is found in greater proportion in asparagus stalks. Considering the possibility of valorization of solid waste from the food industry, this research aims to evaluate and compare the environmental profile of the different schemes of rutin asparagus extraction. Specifically, Soxhlet, pressurized liquid and supercritical fluid extractions, all of them using ethanol as the extracting agent. The environmental analysis is conducted according to the Life Cycle Assessment methodology under a mass and economic allocation. The results, under economic allocation, show that the scenario based on pressurized liquid extraction have the best environmental profile. However, when mass allocation is considered, the pressurized liquid-based scenario is the worst choice. Consequently, the choice of the solvents will influence the Soxhlet extraction performance. In this regard, ethanol, methanol and ethyl acetate are selected. The solvent comparison identifies ethyl acetate as the extraction agent with the worst environmental profile
2022-03-15
2022-03-15
2021
journal article
Food and Bioproducts Processing 129 (2021) 176-189. https://doi.org/10.1016/j.fbp.2021.08.005
http://hdl.handle.net/10347/27651
10.1016/j.fbp.2021.08.005
0960-3085
eng
https://doi.org/10.1016/j.fbp.2021.08.005
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 The Authors. Published by Elsevier B.V. on behalf of Institution of Chemical Engineers. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Elsevier
oai:minerva.usc.es:10347/329762024-03-21T09:21:42Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Environmental and techno-economic assessment on the valorization of vine-side streams to produce resveratrol
Arias Calvo, Ana
Costa, Carlos E.
Moreira Vilar, María Teresa
Feijoo Costa, Gumersindo
Domingues, Lucília
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Winemaking process residues
Sustainability assessment
Economic analysis
Environmental profile
Antioxidant
Resveratrol
One of the most promising alternatives to face the environmental deterioration and handling of waste is the development of biotechnological processes. In this context, the winemaking process of red grapes gives rise to waste streams whose properties are suitable for the biotechnological production of high-value-added products, such as resveratrol, a polyphenol with functional properties. In this research article, vine pruning residues, grape must and wine lees are valorized through precision fermentation, considering its modeling at a real production scale using the SuperPro Designer tool. Besides, economic and environmental assessments provided valuable information on the potential commercialization of the resveratrol based on the proposed valorization process. The results obtained show that the use of grape must residues to produce resveratrol is the most promising alternative from both the techno-economic and environmental perspectives. In conclusion, it could be stated that the bioproduction of resveratrol by precision fermentation using wine-related waste is both sustainable adequate and economically attractive
2024-03-04
2024-03-04
2023
journal article
Journal of Cleaner Production, Volume 429, 2023, 139622
0959-6526
http://hdl.handle.net/10347/32976
10.1016/j.jclepro.2023.139622
eng
https://doi.org/10.1016/j.jclepro.2023.139622
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/331672024-03-21T09:21:42Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Environmental proteomics as a useful methodology for early-stage detection of stress in anammox engineered systems
Guzmán-Fierro, Víctor
Diéguez-Seoane, Alberto
Roeckel, Marlene
Lema Rodicio, Juan Manuel
Trueba-Santiso, Alba
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anammox process
Industrial effluents
Nitrogen removal
Proteomics
Stress-monitoring
Wastewater treatability
Anammox bacteria are widely applied worldwide for denitrification of urban wastewater. Differently, their application in the case of industrial effluents has been more limited. Those frequently present high loads of contaminants, demanding an individual evaluation of their treatability by anammox technologies. Bioreactors setting up and recovery after contaminants-derived perturbations are slow. Also, toxicity is frequently not acute but cumulative, which causes negative macroscopic effects to appear only after medium or long-term operations. All these particularities lead to relevant economic and time losses. We hypothesized that contaminants cause changes at anammox proteome level before perturbations in the engineered systems are detectable by macroscopic analyses. In this study, we explored the usefulness of short-batch tests combined with environmental proteomics for the early detection of those changes. Copper was used as a model of stressor contaminant, and anammox granules were exposed to increasing copper concentrations including previously reported IC50 values. The proteomic results revealed that specific anammox proteins involved in stress response (bacterioferritin, universal stress protein, or superoxide dismutase) were overexpressed in as short a time as 28 h at the higher copper concentrations. Consequently, EPS production was also increased, as indicated by the alginate export family protein, polysaccharide biosynthesis protein, and sulfotransferase increased expression. The described workflow can be applied to detect early-stage stress biomarkers of the negative effect of other metals, organics, or even changes in physical-chemical parameters such as pH or temperature on anammox-engineered systems. On an industrial level, it can be of great value for decision-making, especially before dealing with new effluents on facilities, deriving important economic and time savings.
2024-03-13
2024-03-13
2024
journal article
Science of The Total Environment Volume 912, 20 February 2024, 169349
0048-9697
http://hdl.handle.net/10347/33167
10.1016/j.scitotenv.2023.169349
eng
http://creativecommons.org/licenses/by-nc/4.0/
open access
© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC license
Atribución-NoComercial 4.0 Internacional
oai:minerva.usc.es:10347/264392023-07-10T06:21:44Zcom_10347_15635com_10347_15468com_10347_227com_10347_20714com_10347_2889com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_20715col_10347_12262
Multi-product strategy to enhance the environmental profile of the canning industry towards circular economy
Cortés Montoya, Antonio José
Esteve Llorens, Xavier
González García, Sara
Moreira Vilar, María Teresa
Feijoo Costa, Gumersindo
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Life Cycle Assessment
Canned tuna
Value chain
Valorisation
By-products
The sustainable and continued production of enough food to feed the entire world's population is one of the main concerns in the food industry. Spain, and in particular Galicia, which is an eminently fishing region characterised by the consumption of large quantities of fish, both fresh and processed, must face the challenge of shifting its seafood productive fabric towards a circular economy. To achieve this objective, the first task is to demonstrate that circular economy principles allow to reduce the environmental impacts associated with seafood production. In this sense, this study proposes the environmental evaluation of the skipjack tuna (Katsuwonus pelamis) value chain within a canning industry located in Galicia through the LCA methodology from an attributional perspective, including the valorisation processes for biowaste (edible and inedible by-products). Results indicate that the main crucial subsystems of the value chain are tuna fishing and the canning process, as it was expected considering other similar studies on seafood products. Moreover, this specific case study demonstrates that the multi-product strategy applied to the canning sector is environmentally viable. Thus, although the environmental impacts of the entire system are increased by including further valorisation operations, the environmental loads assigned to the main product (canned tuna) decrease compared to the one-product system by assigning environmental burdens to other value-added products (tuna pâté, fishmeal, and fish oil)
2021-06-10
2023-06-05
2021
journal article
Science of The Total Environment Volume, 791, 15 October 2021, 148249. https://doi.org/10.1016/j.scitotenv.2021.148249
0048-9697
http://hdl.handle.net/10347/26439
10.1016/j.scitotenv.2021.148249
eng
https://doi.org/10.1016/j.scitotenv.2021.148249
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2014-14984/ES
http://creativecommons.org/licenses/by-nc-nd/4.0/
embargoed access
© 2021 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/300002023-07-10T06:11:36Zcom_10347_2989com_10347_2889com_10347_227com_10347_2988com_10347_2955com_10347_2893com_10347_2888com_10347_2904com_10347_2890col_10347_9764col_10347_11762col_10347_12262col_10347_12265
Mannose-modified hyaluronic acid nanocapsules for the targeting of tumor-associated macrophages
Fernández Mariño, Iago
Anfray, Clément
Crecente Campo, José
Maeda, Akihiro
Ummarino, Aldo
Teijeiro Valiño, Carmen
Blanco Martínez, Darío
Mpambani, Francis
Poul, Laurence
Devalliere, Julie
Germain, Matthieu
Correa Chinea, Juan Francisco
Fernández Villamarín, Marcos
Allavena, Paola
Fernández Megía, Eduardo
Alonso Fernández, María José
Torres Andón, Fernando
Universidade de Santiago de Compostela. Centro de Investigación en Medicina Molecular e Enfermidades Crónicas
Universidade de Santiago de Compostela. Centro de Investigación en Química Biolóxica e Materiais Moleculares
Universidade de Santiago de Compostela. Departamento de Farmacoloxía, Farmacia e Tecnoloxía Farmacéutica
Universidade de Santiago de Compostela. Departamento de Química Orgánica
Cancer
Hyaluronic acid
Mannose
Polymeric nanocapsules
Nanoprimer
Tumor-associated macrophages
Tumor-associated macrophages (TAMs), a class of immune cells that play a key role in tumor immunosuppression, are recognized as important targets to improve cancer prognosis and treatment. Consequently, the engineering of drug delivery nanocarriers that can reach TAMs has acquired special relevance. This work describes the development and biological evaluation of a panel of hyaluronic acid (HA) nanocapsules (NCs), with different compositions and prepared by different techniques, designed to target macrophages. The results showed that plain HA NCs did not significantly influence the polarization of M0 and M2-like macrophages towards an M1-like pro-inflammatory phenotype; however, the chemical functionalization of HA with mannose (HA-Man) led to a significant increase of NCs uptake by M2 macrophages in vitro and to an improved biodistribution in a MN/MNCA1 fibrosarcoma mouse model with high infiltration of TAMs. These functionalized HA-Man NCs showed a higher accumulation in the tumor compared to non-modified HA NCs. Finally, the pre-administration of the liposomal liver occupying agent Nanoprimer™ further increased the accumulation of the HA-Man NCs in the tumor. This work highlights the promise shown by the HA-Man NCs to target TAMs and thus provides new options for the development of nanomedicine and immunotherapy-based cancer treatments
2023-01-24
2023-01-24
2022
journal article
Fernández-Mariño, I., Anfray, C., Crecente-Campo, J. et al. Mannose-modified hyaluronic acid nanocapsules for the targeting of tumor-associated macrophages. Drug Deliv. and Transl. Res. (2022). https://doi.org/10.1007/s13346-022-01265-9
2190-393X
http://hdl.handle.net/10347/30000
10.1007/s13346-022-01265-9
2190-3948
eng
https://doi.org/10.1007/s13346-022-01265-9
Info:eu-repo/grantAgreement/EC/H2020/ERA NET EuroNanoMed GA N 723770
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/
Atribución 4.0 Internacional
Springer
oai:minerva.usc.es:10347/218672023-07-10T06:18:09Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Determination of thermal transitions of gluten-free chestnut flour doughs enriched with brown seaweed powders and antioxidant properties of baked cookies
Arufe Vilas, Santiago
Sineiro Torres, Jorge
Moreira Martínez, Ramón Felipe
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Food science
Chemical engineering
Thermal process calculations in food
Engineering
Viscoelasticity
Gluten-free food
Starch
Antioxidant additive
Baking
A protocol for determining the characteristic temperatures of thermomechanical transitions on gluten-free flour
doughs is proposed. This protocol is based on the mathematical analysis of experimental curve of storage modulus
(G0
) vs temperature obtained by means of Dynamic Mechanical Thermal Analysis (DMTA) technique. Doughs at
constant consistency of chestnut flour with different levels (3, 6 and 9% flour basis, f.b.) of brown seaweed
(Bifurcaria bifurcata, Fucus vesiculosus and Ascophyllum nodosum) powders addition, 2% f.b. of guar gum and 1.8%
f.b. of salt with different water absorption were used to test the proposed protocol. The ranges of temperatures
corresponding to starch gelatinization (59–97 C), amylopectin crystallites melting (82–101 C), reversible
dissociation of lipid-amylose complexes (107–128 C) and amylose melting (133–171 C) showed a strong
dependence with water absorption of samples. Doughs with the same water absorption submitted to starch
gelatinization during mixing were also analysed to corroborate the protocol suitability. Total polyphenols content
and radical scavenging activity of extracts from chestnut flour-seaweed powder blends and seaweed-enriched
chestnut cookies baked at 180 C were determined. Extraction assisted with ultrasounds was carried out
employing acetone-water (70:30 v/v) solution as solvent during 4 min with a liquid/solid ratio of 30 w/w.
Seaweed powder addition had a positive effect on antioxidant properties of doughs before baking. However, the
seaweed powder addition effect on baked products (cookies) is not clear due to antioxidant activity is overlapped
by Maillard's products generated during baking
2020-04-29
2020-04-29
2019
journal article
Arufe, S., Sineiro, J., Moreira, R. (2019). Determination of thermal transitions of gluten-free chestnut flour doughs enriched with brown seaweed powders and antioxidant properties of baked cookies. Heliyon, 5 (6) e01805. doi:10.1016/j.heliyon.2019.e01805
2405-8440
http://hdl.handle.net/10347/21867
10.1016/j.heliyon.2019.e01805
eng
https://doi.org/10.1016/j.heliyon.2019.e01805
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2013–43616-P/ES/OBTENCION DE PRODUCTOS SIN GLUTEN ENRIQUECIDOS CON ALGA MICRONIZADA Y CON EXTRACTOS DE ACTIVIDAD ANTIOXIDANTE: INFLUENCIA DE LOS PROCESOS TERMICOS
https://creativecommons.org/licenses/by/4.0/
open access
© 2019 The Authors. Published by Elsevier Ltd. Creative Commons Attribution (CC BY 4.0) Permitted: Read, print & download, Redistribute or republish the final article, Text & data mine, Translate the article, Reuse portions or extracts from the article in other Works, Sell or re-use for commercial purposes
Elsevier
oai:minerva.usc.es:10347/294772023-07-10T06:11:01Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Addressing the food, nutrition and environmental nexus: the role of socio-economic status in the nutritional and environmental sustainability dimensions of dietary patterns in Chile
Cambeses Franco, Cristina
Rebolledo-Leiva, Ricardo
González García, Sara
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Carbon footprint
Diet quality
Income level
Sustainability
Water footprint
The effects of climate change and water scarcity on food security in Latin America and the prevalence of metabolic risk factors that increase the likelihood of non-communicable diseases (NCDs) among Chilean citizens are considered two significant challenges. The 2020 Sustainable Development Goals Report shows that an increasing number of people are suffering from food insecurity, and the growing stress on the environment associated with food production and resource exploitation. Therefore, the evaluation and monitoring of nutritional habits must be addressed because of their central role in meeting healthy and sustainable food goals. The objective of this study was to assess the environmental impacts (carbon and water footprint), nutritional quality and cost of diets of different socio-economic subgroups in Chile, mapping environmental hotspots and food insecurity. It was found that higher income was associated with higher environmental burdens related to food choices and higher dietary costs. Carbon and water footprints ranged from 2.42 to 4.74 kg CO2eq·person−1·day−1 and 1683–3110 L·person−1·day−1 for the first and fifth quintile, respectively. Chilean residents in the highest socio-economic quintile consumed more meat and fewer starch-based products than those in the lowest quintile. Meat was the main contributor to the carbon (56%–59%) and water (40%–43%) footprints and the determining factor in the differences between income quintiles. Although current diets in Chile do not meet nutritional recommendations, diet quality also increased with socioeconomic status. These findings could serve as a reference to implement public policies in Chile, ensuring healthy eating and food security in the context of climate change and water scarcity
2022-11-28
2022-11-28
2022
journal article
Journal of Cleaner Production 379 (2022) 134723
http://hdl.handle.net/10347/29477
10.1016/j.jclepro.2022.134723
0959-6526
eng
https://doi.org/10.1016/j.jclepro.2022.134723
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PCI2020-111978/ES/MEJORA DE LA DIVERSIDAD EN LOS SISTEMAS DE CULTIVO DE CEREALES MEDITERRANEOS
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/203892023-07-10T06:17:13Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Linking environmental sustainability and nutritional quality of the Atlantic diet recommendations and real consumption habits in Galicia (NW Spain)
Esteve Llorens, Xavier
Moreira Vilar, María Teresa
Feijoo Costa, Gumersindo
González García, Sara
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Atlantic diet
Consumption patterns
GHG emissions
LCA
Nutritional quality
Sustainability
Today's society is increasingly aware of food consumption patterns. Under the perspective that real consumption trends are often not in line with healthy recommendations, this research focuses on the study of the environmental and nutritional sustainability of two types of food consumption habits present in the northern Atlantic area of Spain (Galicia). The main objective is, therefore to detect the existing deviations between the current Galician diet (GD) and the traditional and increasingly relevant Recommended Atlantic Diet (RAD), allowing verifying whether current consumption patterns ensure an optimal and sustainable nutritional profile. In this sense, the carbon footprint from a Life Cycle Assessment perspective has been estimated as environmental indicator of both dietary patterns and, the nutritional quality has been determined by the Nutrient Rich Diet 9.3 index and the Health gain score. The carbon footprint of both dietary models is moderately high compared to recommended diets such as the Mediterranean one. Comparing the two scenarios, the associated greenhouse gas emissions are about 15% higher for GD than for RAD, mainly due to the higher intake of beef and dairy products. On the other hand, nutritional quality is comparatively higher for RAD than for GD, associated with higher consumption of vegetables and fruits. An additional objective of this work has been to consider a sensitivity analysis to determine the effect of replacing beef with alternative sources.
Having in mind this study, it can be concluded that the real consumption pattern in Galicia is far from the recommended one, with worse environmental and nutritional quality. The promotion of social awareness policies to guide consumers in the choice a healthier and more environmentally sustainable dietary pattern should be advisable for regional decision-makers as well as for those who wish to promote adherence to the Atlantic diet in other regions and countries
2019-12-05
2021-05-18
2019-09-15
journal article
Esteve-Llorens, X., Moreira, M., Feijoo, G., & González-García, S. (2019). Linking environmental sustainability and nutritional quality of the Atlantic diet recommendations and real consumption habits in Galicia (NW Spain). Science Of The Total Environment, 683, 71-79. doi: 10.1016/j.scitotenv.2019.05.200
0048-9697
http://hdl.handle.net/10347/20389
10.1016/j.scitotenv.2019.05.200
eng
https://doi.org/10.1016/j.scitotenv.2019.05.200
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2014-14984/ES/
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/303362023-03-18T03:03:12Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Water-Energy-Food nexus index proposal as a sustainability criterion on dairy farms
Entrena-Barbero, Eduardo
Rebolledo-Leiva, Ricardo
Vásquez Ibarra, Leonardo
Fernández Redondo, Mario
Feijoo Costa, Gumersindo
González García, Sara
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Milk production
Environmental indicators
Life cycle assessment
Feeding additives
Animal wellbeing
Composite index
Cow milk is a fundamental nutrients source for the human diet at all stages of life. However, the decline in cow milk consumption over the years has been driven by increased consumer awareness of animal welfare and the environmental burdens associated. In this regard, different initiatives have emerged to mitigate the impacts of livestock farming, but many of them without addressing the multi-perspective view of environmental sustainability. Thus, the Water-Energy-Food (WEF) nexus emerges as a framework to consider the complex synergies among carbon emissions, water demand, energy requirements and food production. In this study, a novel and harmonised WEF nexus approach has been proposed and applied to evaluate a set of 100 dairy farms. For that, the assessment, normalisation, and weighting of three lifecycle indicators such as carbon, water and energy footprints, as well as the milk yield were carried out to obtain a single value, the WEF nexus index (WEFni), which varies from 0 to 100. Results show that the WEF nexus scores obtained vary from 31 to 90, demonstrating large differences among the farms assessed. A cluster ranking was performed to identify those farms with the worst WEF nexus indexes. For this group, consisting of 8 farms with an average WEFni of 39, three improvement actions focused on the feeding, digestive process and wellbeing of the cows were applied to determine the potential reduction in the two main hotspots identified: cow feeding and milk production level. The proposed methodology can establish a roadmap for promoting a more environmentally sustainable food industry, although further studies are still required in the pathway of a standardised WEFni
2023-03-17
2023-03-17
2023
journal article
Science of The Total Environment 874, (2023), 162507. https://doi.org/10.1016/j.scitotenv.2023.162507
0048-9697
http://hdl.handle.net/10347/30336
10.1016/j.scitotenv.2023.162507
eng
https://doi.org/10.1016/j.scitotenv.2023.162507
http://creativecommons.org/licenses/by/4.0/
open access
©2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/292082023-07-10T06:11:08Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Electrospray deposition: a breakthrough technique for proton exchange membrane fuel cell catalyst layer fabrication
Conde López, Julio José
Ferreira-Aparicio, Paloma
Chaparro, Antonio
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
PEM fuel cells
Electrospray
Electrohydrodynamic spray
Review
Superhydrophobic electrodes
This Spotlight article presents the state-of-the-art of electrospray deposition technique applied to the fabrication of proton exchange membrane fuel cell (PEMFC) components, mainly focusing on catalyst layers in gas diffusion electrodes. The atomization of a suspension of particles over a substrate under the influence of a strong electric field results in the growth of a film with macroporous morphology and many interesting properties. This so-called electrospray deposition has reported many noteworthy beneficial effects for the fabrication of the catalyst layers of gas diffusion electrodes of PEMFCs. The electrosprayed catalyst layers prepared from suspensions of catalyst particles and ionomers present a dendritic macroporous morphology with superhydrophobic character that improves the water management inside the cell and increases the performance by ∼20% with respect to standard electrodes prepared by airbrushing. Other interesting effects observed with electrosprayed catalyst layers are increased catalyst utilization and water absorption capabilities of the ionomer, improved performance under nonhumidified conditions, and a reduction in catalyst degradation. In addition, the electrospray deposition decreases platinum losses during fabrication thanks to the attractive electrostatic forces between the ion mist and the substrate compared with regular ink-based spray methods
2022-09-06
2022-09-06
2022
journal article
ACS Appl. Energy Mater. 2021, 4, 8, 7394–7404
http://hdl.handle.net/10347/29208
10.1021/acsaem.1c01445
2574-0962
eng
https://doi.org/10.1021/acsaem.1c01445
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-110896RB-I00/ES/PILAS DE COMBUSTIBLE DE HIDROGENO CON ENSAMBLAJES MEMBRANA-ELECTRODO AVANZADOS PARA SU APLICACION EN APLICACIONES DE BAJA POTENCIA Y PORTATILES
http://creativecommons.org/licenses/by/4.0/
open access
© 2021 American Chemical Society. This article is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/deed.en)
Atribución 4.0 Internacional
ACS Publications
oai:minerva.usc.es:10347/294502023-07-10T06:11:01Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Microalgae-bacterial biomass outperforms PN-anammox biomass for oxygen saving in continuous-flow granular reactors facing extremely low-strength freshwater aquaculture streams
Val del Río, María Ángeles
Amorim, Catarina L.
Couto, Ana T.
Arregui Maraver, Luz
Castro, Paula M. L.
Mosquera Corral, Anuska
Santorio Aldariz, Sergio
Universidade de Santiago de Compostela. Departamento de Química Orgánica
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Aquaculture effluents
Continuous-flow reactors
Extremely low-strength wastewater
Water recycling
Granular sludge
Microalgae-bacteria consortium
PN-Anammox
The dissolved oxygen (DO) concentration in water streams is one of the most important and critical quality parameters in aquaculture farms. The main objective of this study was to evaluate the potential of two Continuous Flow Granular Reactors, one based on Partial Nitrification-Anammox biomass (Aquammox CFGR) and the other on Microalgae-Bacteria biomass (AquaMab CFGR), for improving dissolved oxygen availability in the recirculation aquaculture systems (RAS). Both reactors treated the extremely low-strength effluents from a freshwater trout farm (1.39 mg NH4+-N/L and 7.7 mg TOC/L). The Aquammox CFGR, removed up to 68% and 100% of ammonium and nitrite, respectively, but the DO concentration in the effluent was below 1 mg O2/L while the anammox activity was not maintained. In the AquaMab CFGR, bioaugmentation of aerobic granules with microalgae was attained, producing an effluent with DO concentrations up to 9 mg O2/L and removed up to 77% and 80% of ammonium and nitrite, respectively, which is expected to reduce the aeration costs in fish farms
2022-11-22
2022-11-22
2022
journal article
Chemosphere 308 (2022) 136184
http://hdl.handle.net/10347/29450
10.1016/j.chemosphere.2022.136184
0045-6535
eng
https://doi.org/10.1016/j.chemosphere.2022.136184
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PCIN-2017-047/ES
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO/RECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/156472023-07-10T06:12:56Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Biomass aggregation influences NaN3 short-term effects on anammox bacteria activity
Pedrouso Fuentes, Alba
Val del Río, María Ángeles
Campos Gómez, José Luis
Méndez Pampín, Ramón José
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Anammox
Granules
Inhibition
NOB
Partial nitritation
Sodium azide
The main bottleneck to maintain the long term stability of the partial nitritation-anammox processes, especially those operated at low temperatures and nitrogen concentrations is the undesirable development of nitrite oxidizing bacteria (NOB). When this occurs, the punctual addition of compounds with the capacity to specifically inhibit NOB without affecting the process efficiency might be of interest. Sodium azide (NaN3) is an already known NOB inhibitor which at low concentrations does not significantly affect the ammonia oxidizing bacteria (AOB) activity. However, studies about its influence on anammox bacteria are unavailable. For this reason the objective of the present study was to evaluate the effect of NaN3 on the anammox activity. Three different types of anammox biomass were used: granular biomass comprising AOB and anammox bacteria (G1), anammox enriched granules (G2) and previous anammox granules disaggregated (F1). No inhibitory effect of NaN3 was measured on G1 sludge however the anammox activity decreased in the case of G2 and F1. Granular biomass activity was less affected (IC50 90 mg/L, G2) than flocculent one (IC50 5 mg/L, F1). Summing up not only the granular structure protects the anammox bacteria from the NaN3 inhibitory effect but also the AOB act as a barrier decreasing the inhibition
2017-07-28
2017-09-01
2017-03
journal article
A. Pedrouso, A. Val del Río, J.L. Campos, R. Méndez, A. Mosquera-Corral, Biomass aggregation influences NaN3 short-term effects on anammox bacteria activity, Water Science and Technology, 75 (2017) 1007-1013. DOI: 10.2166/wst.2016.587
0273-1223
http://hdl.handle.net/10347/15647
10.2166/wst.2016.587
eng
https://doi.org/10.2166/wst.2016.587
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-55021-R/ES/SISTEMA SOSTENIBLE PARA LA VALORIZACION DE AGUAS RESIDUALES DE CONSERVERA DE PESCADO A TRAVES DE LA PRODUCCION DE BIOPOLIMEROS
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2014-55397-JIN/ES/DESARROLLO DE SISTEMAS SOSTENIBLES BASADOS EN BIOMASA GRANULAR PARA EL TRATAMIENTO DE AGUAS RESIDUALES PROCEDENTES DE LA INDUSTRIA DE PRODUCTOS DEL MAR
open access
© IWA Publishing 2017
IWA Publishing
oai:minerva.usc.es:10347/331722024-03-21T09:21:43Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Comparative life cycle analysis of PHA-based consumer items for daily use
Saavedra del Oso, Mateo
Nair, Rakesh
Mauricio Iglesias, Miguel
Hospido Quintana, Almudena
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Bioplastics
Cradle-to-grave
End-of-life
Life cycle assessment
Upscaling
USABLE Packaging project has developed an innovative value chain based on mixed microbial cultures using organic wastes as feedstock to produce prototypes of PHA-based items that were compared to their commercial counterparts, so the expected better environmental performance can be checked. To do so, a cradle-to-grave life cycle assessment was carried out. The system was modeled integrating all available knowledge, from pilot-scale data to process simulators, and following upscaling frameworks. PHA-based items outperform their commercial counterparts since they show environmental benefits thanks to the avoided electricity obtained in the cogeneration heat and power unit within the PHA production; however, these environmental benefits are very sensitive to the substituted electricity environmental burdens. The different levels of development and market implementation are seen as critical and therefore attention should be paid on how upscaling affects the results and interpretation of the LCA while serving as a guide for process and product development
2024-03-13
2024-03-13
2023
journal article
Resources, Conservation and Recycling, Volume 199, 2023, 107242
0921-3449
http://hdl.handle.net/10347/33172
10.1016/j.resconrec.2023.107242
eng
https://doi.org/10.1016/j.resconrec.2023.107242
http://creativecommons.org/licenses/by/4.0/
open access
© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/275762023-07-10T06:11:30Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Fostering the valorization of organic wastes into carboxylates by a computer-aided design tool
Saavedra del Oso, Mateo
Regueira López, Alberte
Hospido Quintana, Almudena
Mauricio Iglesias, Miguel
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Early-stage design
Aided decision making
Resource recovery
VFA production
Mathematical modelling
The carboxylate platform has the potential to constitute an outstanding opportunity for converting organic wastes into chemicals and other value-added products within a circular economy framework. However, its development is still hampered by technological and financial constraints due to difficulties at forecasting the carboxylates yields by different wastes. This work provides a framework that can be the key to foster circular economy and bridge the development risks, allowing early-stage evaluation of process performance. This framework, which is implemented as a computer-aided design tool, is comprised by: (i) a library of substrates including their characterization and appropriate kinetic parameter selection, (ii) an integral kinetic and stoichiometric model which solves both identified gaps regarding the disintegration mechanisms and the acidogenic stoichiometry variability in the anaerobic mono and cofermentation of complex organic wastes, and (iii) a set of indicators to interpret simulation results and assist the decision making; and presents a showcase of applications supported by two case studies. These case studies show that the optimal conditions to steer VFA spectrum towards odd-chain VFA in MCF of regrind pasta are neutral pH (6.5–7) and a relatively low HRT (3–4 days), while cofermentation of tuna canning wastewater and regrind pasta follows interactive mechanisms that cannot be captured by a “naïve approach”, i.e. by adding up the individual contributions. Finally, it is discussed how value chain actors with different interests can benefit from the proposed tool: identifying technical, economic, and environmental bottlenecks, and proposing innovative solutions prior to costly lab research and piloting
2022-02-18
2022-02-18
2022
journal article
Waste Management 142 (2022) 101-110
http://hdl.handle.net/10347/27576
10.1016/j.wasman.2022.02.008
0956-053X
eng
https://doi.org/10.1016/j.wasman.2022.02.008
info:eu-repo/grantAgreement/EC/H2020-BBI-JTI-2018
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/292032022-09-06T02:02:38Zcom_10347_2988com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_11762col_10347_12262
Topological dynamics of micelles formed by geometrically varied surfactants
Sánchez Fernández, Adrián
Larsson, Johan
Leung, Anna
Holmqvist, Peter
Czakkel, Orsolya
Nylander, Tommy
Ulvenlund, Stefan
Wahlgren, Marie
Universidade de Santiago de Compostela. Centro de Investigación en Química Biolóxica e Materiais Moleculares
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Diffusion
Fluid dynamics
Micelles
Molecular dynamics
Surfactants
The molecular architecture of sugar-based surfactants strongly affects their self-assembled structure, i.e., the type of micelles they form, which in turn controls both the dynamics and rheological properties of the system. Here, we report the segmental and mesoscopic structure and dynamics of a series of C16 maltosides with differences in the anomeric configuration and degree of tail unsaturation. Neutron spin-echo measurements showed that the segmental dynamics can be modeled as a one-dimensional array of segments where the dynamics increase with inefficient monomer packing. The network dynamics as characterized by dynamic light scattering show different relaxation modes that can be associated with the micelle structure. Hindered dynamics are observed for arrested networks of worm-like micelles, connected to their shear-thinning rheology, while nonentangled diffusing rods relate to Newtonian rheological behavior. While the design of novel surfactants with controlled properties poses a challenge for synthetic chemistry, we demonstrate how simple variations in the monomer structure can significantly influence the behavior of surfactants
2022-09-05
2022-09-05
2022
journal article
Langmuir 2022, 38, 33, 10075–10080
0743-7463
http://hdl.handle.net/10347/29203
10.1021/acs.langmuir.2c00230
1520-5827
eng
https://doi.org/10.1021/acs.langmuir.2c00230
http://creativecommons.org/licenses/by/4.0/
open access
© 2022 The Authors. Published by American Chemical Society. This work is published under a CC BY 4.0. license.
ACS Publications
oai:minerva.usc.es:10347/227322020-06-02T02:00:51Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Deshidratación osmótica de castaña en medios estáticos y dinámicos de sal, sacarosa y glucosa
Chenlo Romero, Francisco
Moreira Martínez, Ramón Felipe
Torres Pérez, María Dolores
Ferra, J.
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Agitación
Deshidratación osmótica
Parámetros cinéticos
Coeficientes de transferencia de materia
Stirring effect
Osmotic dehydration
Kinetic parameters
Mass transfer coefficients
Se estudió la deshidratación osmótica de la castaña en disoluciones acuosas de sal (17, 22, 26,5 % p/p), sacarosa (40,
50, 60 % p/p) y glucosa (40, 50, 56,5 % p/p) a diferentes grados de agitación (0, 40, 110 rpm) y tiempos (1, 2, 4, 8 h) a 20 ºC.
En las disoluciones de glucosa se estudió el efecto de la temperatura (50 ºC). Se determinaron los parámetros cinéticos de
ganancia de sólidos, pérdida de agua, reducción de peso y relación pérdida de agua-ganancia de sólidos. Al aumentar la
agitación, aumentó la ganancia de sólidos, la pérdida de agua y disminuyó la relación entre ambos, especialmente cuando las
disoluciones tuvieron elevada viscosidad. Las cinéticas de los contenidos de humedad y de sólidos se modelizaron mediante
la ecuación de Hawkes y Flink para tiempos cortos. Se determinaron los coeficientes de transferencia para el agua y el soluto
osmótico y los coeficientes de difusividad mediante la ley de Fick.
Chestnut fruits were submitted to osmotic dehydration in sodium chloride (17, 22, 26.5 % w/w), sucrose (40, 50, 60
% w/w) and glucose (40, 50, 56.5 % w/w) solutions at different stirring rates (0, 40, 110 rpm) and periods of time (1, 2, 4,
8 h) at 20 ºC. The effect of temperature (50 ºC) was studied in the case of samples dehydrated with glucose solutions.
Several parameters for each dehydration process such as solids gain, water loss, and its corresponding ratio and weight
reduction, were determined. High stirring rates increased solids gain and decreased water loss and its ratio, especially in the
case of solutions of high viscosity. Moisture and solids gain contents were modelled by Hawkes and Flink equation for
short times and water and osmotic solute transfer coefficients were calculated. The corresponding effective coefficients of
diffusion were also evaluated by means of Fick’s law.
2020-06-01
2020-06-01
2008
journal article
Chenlo, F., Moreira, R., Torres, M. D., & Ferra, J. (2008). Deshidratación osmótica de castaña en medios estáticos y dinámicos de sal, sacarosa y glucosa. CYTA-Journal of Food, 6(2), 117-129.
1135-8122
http://hdl.handle.net/10347/22732
10.1080/11358120809487636
spa
https://doi.org/10.1080/11358120809487636
open access
©Taylor and Francis Group, LLC. Open Access
Taylor & Francis
oai:minerva.usc.es:10347/306302023-07-10T06:11:16Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
A formulation based on a cationic surface-active ionic liquid and an anionic surfactant for enhanced oil recovery at a carbonate reservoir
Somoza Cerviño, Alba
García Mayoral, M. Flor
Soto Campos, Ana María
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Chemical flooding
Blend
Catanionic surfactant
High temperature
Carbonate rock
With the still huge dependence on crude oil, it is crucial to develop enhanced oil recovery techniques to improve reservoir production and lifespan. Carbonate reservoirs constitute over half the world's oil reserves, but they are challenging in terms of recovery due to their complex pore network, oil-wet or mixed-wet rocks, and harsh conditions of temperature and salinity. This work offers a significant contribution to the exploitation of these reservoirs. A new formulation, able to provide very low interfacial tension at high temperatures with reduced adsorption on carbonate rocks, was designed. A low-cost traditional alkyl benzene sulfonate (RECOLAS158) was mixed with the cationic surface active ionic liquid N,N-diethoxylated-N-tallow-N-ethylammonium ethylsulfate. A formulation containing 56.4 wt% RECOLAS158 was selected for its good performance in terms of phase behavior, injectability and interfacial tension at a wide range of temperatures and salinities. A very significant tertiary oil recovery (19.53% of the original oil in place) and low blend adsorption (0.086 mgblend/grock), demonstrated the promising performance of the formulation. The key mechanism associated to the improvement of oil recovery is interfacial tension reduction
2023-05-31
2023-05-31
2023
journal article
Fuel 346 (2023) 128363
http://hdl.handle.net/10347/30630
10.1016/j.fuel.2023.128363
0016-2361
eng
https://doi.org/10.1016/j.fuel.2023.128363
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PRE2019-089101/ES/DISEÑO DE FORMULACIONES BASADAS EN LIQUIDOS IONICOS PARA LA RECUPERACION MEJORADA DEL PETROLEO
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/203162023-07-10T06:17:39Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Ionic liquids for low-tension oil recovery processes: Phase behavior tests
Rodríguez Escontrela, Iria
Puerto, Maura C.
Miller, Clarence A.
Soto Campos, Ana María
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Surface active ionic liquid
Phase behavior
Surfactant blend
Enhanced oil recovery
This is the accepted manuscript of the following article: Rodriguez-Escontrela, I., Puerto, M., Miller, C., & Soto, A. (2017). Ionic liquids for low-tension oil recovery processes: Phase behavior tests. Journal Of Colloid And Interface Science, 504, 404-416. doi: 10.1016/j.jcis.2017.05.102
Chemical flooding with surfactants for reducing oil-brine interfacial tensions (IFTs) to mobilize residual oil trapped by capillary forces has a great potential for Enhanced Oil Recovery (EOR). Surface-active ionic liquids (SAILs) constitute a class of surfactants that has recently been proposed for this application. For the first time, SAILs or their blends with an anionic surfactant are studied by determining equilibrium phase behavior for systems of about unit water-oil ratio at various temperatures. The test fluids were model alkane and aromatic oils, NaCl brine, and synthetic hard seawater (SW). Patterns of microemulsions
observed are those of classical phase behavior (Winsor I-III-II transition) known to correlate with low IFTs. The two anionic room-temperature SAILs tested were made from common anionic surfactants by substituting imidazolium or phosphonium cations for sodium. These two anionic and two cationic SAILs were found to have little potential for EOR when tested individually. Thus, also tested were blends of an anionic internal olefin sulfonate (IOS) surfactant with one of the anionic SAILs and both cationic SAILs. Most promising for EOR was the anionic/cationic surfactant blend of IOS with [C12mim]Br in
SW. A low equilibrium IFT of 2 10 3 mN/m was measured between n-octane and an aqueous solution having the optimal blend ratio for this system at 25 C
2019-11-28
2019-11-28
2017-10
journal article
Rodriguez-Escontrela, I., Puerto, M., Miller, C., & Soto, A. (2017). Ionic liquids for low-tension oil recovery processes: Phase behavior tests. Journal Of Colloid And Interface Science, 504, 404-416. doi: 10.1016/j.jcis.2017.05.102
0021-9797
http://hdl.handle.net/10347/20316
10.1016/j.jcis.2017.05.102
eng
http://dx.doi.org/10.1016/j.jcis.2017.05.102
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2015-68496-P/ES/RECUPERACION MEJORADA DEL PETROLEO MEDIANTE EL USO DE LIQUIDOS IONICOS SURFACTANTES
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2017 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (https://creativecommons.org/licenses/by-nc-nd/4.0/)
Elsevier
oai:minerva.usc.es:10347/312172023-11-09T01:02:58Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888com_10347_2919com_10347_2891col_10347_20715col_10347_12262col_10347_10699
LED-driven photo-Fenton process for micropollutant removal by nanostructured magnetite anchored in mesoporous silica
González Rodríguez, Jorge
Conde López, Julio José
Vargas Osorio, Zulema
Vázquez Vázquez, Carlos
Piñeiro Redondo, Yolanda
Rivas Rey, José
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Departamento de Física Aplicada
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Reusability
Degradation pathways
Kinetics
Magnetic nanoparticles
LED
Supported catalysts
The presence of organic micropollutants in water bodies represents a threat to living organisms and ecosystems due to their toxicological effects and recalcitrance in conventional wastewater treatments. In this context, the application of heterogeneous photo-Fenton based on magnetite nanoparticles supported on mesoporous silica (SBA15) is proposed to carry out the non-specific degradation of the model compounds ibuprofen, carbamazepine, hormones, bisphenol A and the dye ProcionRed®. The operating conditions (i.e., pH, catalyst load and hydrogen peroxide concentration) were optimized by Response Surface Methodology (RSM). The paramagnetic properties of the nanocatalysts allowed their repeated use in sequential batch operations with catalyst losses below 1%. The feasibility of the process was demonstrated as removal rates above 90% after twelve accomplished after twelve consecutive cycles. In addition, the contributions of different reactive oxygen species, mainly •OH, were analyzed together with the formation of by-products, achieving total mineralization values of 15% on average
2023-11-08
2023-11-08
2023-10-21
journal article
Journal of Environmental Management 349 (2024) 119461
0301-4797
http://hdl.handle.net/10347/31217
10.1016/j.jenvman.2023.119461
eng
https://doi.org/10.1016/j.jenvman.2023.119461
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-111163RB-I00/ES/NANOCATALIZADORES DE ALTO RENDIMIENTO PARA APLICACIONES MEDIOAMBIENTALES (HP-NANOBIO)/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PDC2021-121540-I00/ES/
http://creativecommons.org/licenses/by/4.0/
open access
©2023 The Authors. Published by Elsevier Ltd.This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Atribución 4.0 Internacional
Elsevier
oai:minerva.usc.es:10347/174582023-07-10T06:16:46Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
Exploring the production of bio-succinic acid from apple pomace using an environmental approach
González García, Sara
Argiz Montes, Lucía
Míguez, Patricia
Gullón Estévez, Beatriz
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Bio-based
Biomass fermentation
Butanedioic acid
Cider factory
Life cycle assessment
Sustainability
This is the accepted manuscript of the following article: González-García, S., Argiz, L., Míguez, P., Gullón, B., 2018. Exploring the production of bio-succinic acid from apple pomace using an environmental approach. Chemical Engineering Journal 350, 982-991
Fermentation-derived bio-succinic acid (BioSA) is a valuable intermediate; it is used as a chemical building block, and has multiple industrial applications as an alternative to petroleum counterparts. The aim of this study was to develop a full-scale plant to produce BioSA fromapple pomace, a low-cost solid waste from the cider- and juice-making industry, based on abiorefineryconcept, and to determine its environmental profile using acradleto-factory-gate, scaled-up LCA approach. Foreground data used in this LCA were based on mass and energy flows, modelled in detail. The production process was divided into three stages: i) reconditioning and storage; ii) fermentation with Actinobacillus succinogenes; and iii) purification. The results indicate that the use of enzymes is responsible for the highest environmental burdens, due to their highly energy-intensive background production processes. When these were excluded from the analysis (following other studies available in the literature), the purification stage played an environmentally significant role, due to the extraction and distillation units involved. The electricity use and the requirements for organic solvents in these operations make up the largest environmental burdens. Thus, approaches with the highest potential for improvement must involve both operations. Alternatives for improvement are proposed that offer interesting potential reductions in the environmental profile, especially at the purification stage.
2018-10-15
2020-06-09
2018-06-09
journal article
González-García, S., Argiz, L., Míguez, P., Gullón, B., 2018. Exploring the production of bio-succinic acid from apple pomace using an environmental approach. Chemical Engineering Journal 350, 982-991
1385-8947
http://hdl.handle.net/10347/17458
10.1016/j.cej.2018.06.052
eng
https://doi.org/10.1016/j.cej.2018.06.052
info:eu-repo/grantAgreement/EC/H2020/727740
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/IJCI-2015-25305/ES
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2014-14984/ES
https://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2018 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Elsevier
oai:minerva.usc.es:10347/166812020-01-31T09:25:48Zcom_10347_15635com_10347_15468com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_15636col_10347_12262
An environmental evaluation of food supply chain using life cycle assessment: A case study on gluten free biscuit products
Noya López, Isabel
Vasilaki, Vasileia
Stojceska, Valentina
González García, Sara
Kleynhans, Chantelle
Tassou, Savvas
Moreira Vilar, María Teresa
Katsou, Evina
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Life Cycle Assessment (LCA)
Gluten-free biscuits
Food
Bakery industry
Sensitivity analysis
Supply chain
Environmental profile
This paper assesses the environmental profile of the biscuit supply chain for producing high quality gluten-free biscuits. Three different types of biscuits were considered. The assessment followed a cradle-to-grave approach applying the ISO standards in compliance with the Product Category Rules (PCR) defined within EPD (Environmental Product Declaration) for bakery products. Analogous environmental profiles were implemented for assessing the products: It was found that the main hotspot in all impact categories was ingredients production with the range contribution from 22.2% to 84.9%, followed by transportation. Initial hypotheses for ingredients origin and waste management practices were demonstrated to have a key influence on the environmental results: higher packaging recycling rates and local ingredients usage led to improved environmental results (up to 5.5%) while direct food waste disposal was responsible for slightly unfavourable performance relative to base case (below 1%). Additionally, healthier ingredients such as xylitol and fructose were used to evaluate their potential benefits from an environmental perspective. It was found that only the use of fructose was a suitable alternative sweetener for more sustainable production
2018-04-27
2018-04-27
2018-01
journal article
Noya, L., Vasilaki, V., Stojceska, V., González-García, S., Kleynhans, C., & Tassou, S. et al. (2018). An environmental evaluation of food supply chain using life cycle assessment: A case study on gluten free biscuit products. Journal Of Cleaner Production, 170, 451-461. http://dx.doi.org/10.1016/j.jclepro.2017.08.226
0959-6526
http://hdl.handle.net/10347/16681
10.1016/j.jclepro.2017.08.226
1879-1786
eng
https://doi.org/10.1016/j.jclepro.2017.08.226
http://creativecommons.org/licenses/by/4.0/
open access
© 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Elsevier
oai:minerva.usc.es:10347/306452023-07-10T06:11:49Zcom_10347_2955com_10347_2893com_10347_2888com_10347_227col_10347_12262
Rapid start-up and stable maintenance of the mainstream nitritation process based on the accumulation of free nitrous acid in a pilot-scale two-stage nitritation-anammox system
Pedrouso Fuentes, Alba
Morales, Nicolás
Rodelas González, Belén
Correa Galeote, David
Val del Rio, Angeles
Campos, José Luis
Vázquez Padín, José Ramón
Mosquera Corral, Anuska
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Ammonium oxidising bacteria (AOB)
Anammox
Municipal wastewater treatment
Nitrite oxidising bacteria (NOB) suppression
PN/AMX pilot plant
Two-stage partial nitritation (PN) and anammox (AMX) systems showed promising results for applying autotrophic nitrogen removal under mainstream conditions. In this study, a pilot-scale (600 L per reactor) two-stage PN/AMX system was installed in a municipal wastewater treatment plant (WWTP) provided with a high-rate activated sludge (HRAS) system for organic carbon removal. The PN/AMX system was operated without temperature control (ranging from 11 to 28 °C) and was subjected to the same variations in wastewater characteristics as the WWTP (22 to 63 mg NH4+- N/L). The developed strategy is simple, does not require the addition of chemicals and is characterised by short start-up periods. The PN process was established by applying a high hydraulic load and maintained by in situ accumulated free nitrous acid (FNA) of 0.015–0.2 mg HNO2-N/L. Based on pH value, a controlled aeration strategy was applied to achieve the target nitrite to ammonium ratio in the effluent (1.1 g NO2–-N/g NH4+-N) to feed the AMX reactor. Although NOB were not fully washed out from the system, nitrite accumulation remained (>99 %) stable with no evidence of NOB activity. In the AMX reactor, an overall nitrogen removal efficiency of 80 % was achieved. Regarding effluent quality, 12 ± 3 mg TN/L was obtained, but 5 mg NO3–-N/L was already in the HRAS effluent. The relative abundance of NOB showed a strong negative correlation with the FNA concentration, providing a good strategy for establishing PN under mainstream conditions
2023-06-06
2023-06-06
2023
journal article
Separation and Purification Technology 317 (2023) 123851
http://hdl.handle.net/10347/30645
10.1016/j.seppur.2023.123851
1383-5866
eng
https://doi.org/10.1016/j.seppur.2023.123851
info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/PCIN-2015-022/ES/REUBICAR LAS PRIMERAS CIUDADES DE EUROPA:UN CASO DE ESTUDIO PARA MEJORAR LA TRANSFERENCIA DE CONOCIMIENTOS Y EL DESARROLLO DE UNA GESTION SOSTENIBLE DE LOS PAISAJES CULTURALES
info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/CTM2014-55397-JIN/ES/DESARROLLO DE SISTEMAS SOSTENIBLES BASADOS EN BIOMASA GRANULAR PARA EL TRATAMIENTO DE AGUAS RESIDUALES PROCEDENTES DE LA INDUSTRIA DE PRODUCTOS DEL MAR
info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/CTQ2017-83225-C2-1-R/ES/ABORDANDO EL TRATAMIENTO/RECUPERACION DE AGUAS RESIDUALES SALINAS PARA ASEGURAR LA DISPONIBILIDAD DE AGUA FUTURA
info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/PID2020-112550RB-C21/ES/DESARROLLO BIOTECNOLOGICO A ESCALA PILOTO DE PRODUCCION DE COMPUESTOS DE ALMACENAMIENTO DE VALOR AÑADIDO (PHA Y/O TAG) A PARTIR DE RESIDUOS LIPIDICOS
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/
Elsevier
oai:minerva.usc.es:10347/294902022-12-01T03:02:44Zcom_10347_20714com_10347_2889com_10347_227com_10347_2955com_10347_2893com_10347_2888col_10347_20715col_10347_12262
Process modelling and environmental assessment on the valorization of lignocellulosic waste to antimicrobials
Arias Calvo, Ana
Feijoo Costa, Gumersindo
Moreira Vilar, María Teresa
Universidade de Santiago de Compostela. Departamento de Enxeñaría Química
Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
Sustainability
Forestry residues
Agricultural residues
Biorefinery
Nisin
Circular economy
The Sustainable Development Goals defined by the United Nations established a roadmap on the way to a sustainable society based on a circular economy in which the residual fractions of process streams emerge as raw materials for the provision of material goods and services. In this context, the approach of biorefineries as the technological scheme for processing integrally renewable resources stands out. Among the different target products, "bioactive" compounds have aroused great interest given their high added value. This work evaluates the environmental profile associated with the valorization of residual lignocellulosic waste streams: olive pruning and eucalyptus residues for the biotechnological production of nisin, an antimicrobial compound produced by Lactoccocus lactis with application in the food preservation and biomedical sectors. Process modelling in combination with Life Cycle Analysis allowed addressing the conceptual design and the environmental assessment of a full-scale production process. As a main conclusion, the technological feasibility of the valorization of waste fractions as sources of fermentable sugars in the biotechnological process has been demonstrated. Moreover, the integral use of the raw materials can allow not only the production of nisin as an economic driver, but also of other biotechnological products such as lactic acid and energy for the self-supply of the process. The main novelty of this manuscript is based on rethinking the valorization of lignocellulosic waste beyond energy recovery to obtain bioproducts with high added value in the market with applicability in the food sector. Although energy recovery is the most widely implemented end-of-life option, the use of lignocellulosic waste as fermentable sugars has been shown to improve sustainability and circularity outcomes
2022-11-30
2022-11-30
2023
journal article
Food and Bioproducts Processing 137 (2023). https://doi.org/10.1016/j.fbp.2022.11.008
http://hdl.handle.net/10347/29490
10.1016/j.fbp.2022.11.008
0960-3085
eng
https://doi.org/10.1016/j.fbp.2022.11.008
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
© 2022 The Author(s). Published by Elsevier Ltd on behalf of Institution of Chemical Engineers. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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