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dc.contributor.authorKennes Veiga, David Manuel
dc.contributor.authorVogler, Bernadette
dc.contributor.authorFenner, Kathrin
dc.contributor.authorCarballa Arcos, Marta
dc.contributor.authorLema Rodicio, Juan Manuel
dc.date.accessioned2021-11-23T07:43:33Z
dc.date.available2021-11-23T07:43:33Z
dc.date.issued2021
dc.identifier.citationScience of The Total Environment 780 (2021) 146564
dc.identifier.issn048-9697
dc.identifier.urihttp://hdl.handle.net/10347/27119
dc.descriptioninfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ES/CTQ2016-80847-R
dc.description.abstractWhile 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
dc.description.sponsorshipThis research was funded by the Spanish Government (Agencia Estatal de Investigación) through the COMETT project (CTQ2016 – 80847-R) and a PhD Xunta de Galicia Grant (ED481A-2018/113, David Kennes). Authors from Universidade de Santiago de Compostela belong to CRETUS Strategic Partnership (AGRUP2015/02) and to Galician Competitive Research Group (GRC ED431C 2017/29), which are co-funded by FEDER (EU)
dc.language.isoeng
dc.publisherElsevier
dc.rights© 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)
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCometabolism
dc.subjectEnzymes
dc.subjectHeterotrophs
dc.subjectPharmaceuticals
dc.subjectTransformation products
dc.subjectWastewater
dc.titleHeterotrophic enzymatic biotransformations of organic micropollutants in activated sludge
dc.typeinfo:eu-repo/semantics/article
dc.identifier.DOI10.1016/j.scitotenv.2021.146564
dc.relation.publisherversionhttps://doi.org/10.1016/j.scitotenv.2021.146564
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Enxeñaría Química
dc.contributor.affiliationUniversidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
dc.description.peerreviewedSI


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© 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)
Except where otherwise noted, this item's license is described as  © 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)





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