Mostrar o rexistro simple do ítem

dc.contributor.authorTaboada Santos, Antón
dc.contributor.authorLema Rodicio, Juan Manuel
dc.contributor.authorCarballa Arcos, Marta
dc.date.accessioned2019-05-21T08:08:30Z
dc.date.available2021-05-09T01:00:11Z
dc.date.issued2019-06-01
dc.identifier.citationTaboada-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
dc.identifier.issn0956-053X
dc.identifier.urihttp://hdl.handle.net/10347/18792
dc.description.abstractNovel 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
dc.description.sponsorshipThe authors would like to thank the EU (ID199) and AEI (PCIN-2015-22) for funding, in the frame of the collaborative international Consortium Pioneer_STP financed under Water Joint Programming Initiative. The authors belong to the Gali- cian Competitive Research Group ED431C 2017/029 and the CRETUS Strategic Partnership (ED431E 2018/01). These programmers are co-funded by FEDER (EU)
dc.language.isoeng
dc.publisherElsevier
dc.rights© 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/)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAnaerobic digestion
dc.subjectEconomy of scale
dc.subjectEnergy autarky
dc.subjectHigh-rate activated sludge
dc.subjectPayback time
dc.subjectSludge disposal
dc.titleEnergetic and economic assessment of sludge thermal hydrolysis in novel wastewater treatment plant configurations
dc.typejournal article
dc.identifier.doi10.1016/j.wasman.2019.05.003
dc.relation.publisherversionhttps://doi.org/10.1016/j.wasman.2019.05.003
dc.type.hasVersionAM
dc.rights.accessRightsopen access
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Enxeñaría Química
dc.description.peerreviewedSI


Ficheiros no ítem

application/pdf
Nome: Artigo principal
Tamaño: 756.1 Kb
Formato: PDF


application/pdf
Nome: Supporting
Tamaño: 220.3 Kb
Formato: PDF


Thumbnail

Este ítem aparece na(s) seguinte(s) colección(s)

Mostrar o rexistro simple do ítem

© 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/)
A licenza do ítem descríbese como
 © 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/)





Recolectores:Enlaces de interese:
Universidade de Santiago de Compostela | Teléfonos: +34 881 811 000 e +34 982 820 000 | Contacto | Suxestións