Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production

Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolon...

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Authors: Perez-Esteban, N., Vives-Egea, Júlia, Dosta Parras, Joan, Astals Garcia, Sergi, Peces, Miriam
Format: article
Status:Versión aceptada para publicación
Publication Date:2024
Country:España
Institution:Universidad de Oviedo (UNIOVI)
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/225054
Online Access:https://hdl.handle.net/2445/225054
Access Level:Open access
Keyword:Bioreactors
Metabolisme microbià
Microbial metabolism
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spelling Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid productionPerez-Esteban, N.Vives-Egea, JúliaDosta Parras, JoanAstals Garcia, SergiPeces, MiriamBioreactorsMetabolisme microbiàBioreactorsMicrobial metabolismTwo perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolonged OLR change to 18 gVS/(L·d). For each OLR, two WAS were studied. The change in OLR led to differentiated fermentation product profile without compromising the fermentation yields (∼300 mgCOD/gVS). At 11 gVS/(L·d), the product profile was dominated by acetic, butyric, and propionic acids while at 18 gVS/(L·d) it shifted to acetic acid, ethanol, and caproic acid. Reverting the OLR also reverted the fermentation profile. The biomass immigration with the WAS changed the fermentation microbial structure and introduced acetic acid-consuming methanogens, which growth was only delayed by the OLR increase. Microbial monitoring and post-fermentation tests can be used for early detection of acetic acid-consuming events.Elsevier B.V.2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/225054Articles publicats en revistes (Enginyeria Química i Química Analítica)reponame:Dipòsit Digital de la UBinstname:Universidad de Oviedo (UNIOVI)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.biortech.2024.131034Bioresource Technology, 2024, vol. 406https://doi.org/10.1016/j.biortech.2024.131034cc-by-nc-nd (c) Elsevier B.V., 2024http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2250542026-05-27T06:46:51Z
dc.title.none.fl_str_mv Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
title Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
spellingShingle Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
Perez-Esteban, N.
Bioreactors
Metabolisme microbià
Bioreactors
Microbial metabolism
title_short Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
title_full Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
title_fullStr Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
title_full_unstemmed Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
title_sort Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
dc.creator.none.fl_str_mv Perez-Esteban, N.
Vives-Egea, Júlia
Dosta Parras, Joan
Astals Garcia, Sergi
Peces, Miriam
author Perez-Esteban, N.
author_facet Perez-Esteban, N.
Vives-Egea, Júlia
Dosta Parras, Joan
Astals Garcia, Sergi
Peces, Miriam
author_role author
author2 Vives-Egea, Júlia
Dosta Parras, Joan
Astals Garcia, Sergi
Peces, Miriam
author2_role author
author
author
author
dc.subject.none.fl_str_mv Bioreactors
Metabolisme microbià
Bioreactors
Microbial metabolism
topic Bioreactors
Metabolisme microbià
Bioreactors
Microbial metabolism
description Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolonged OLR change to 18 gVS/(L·d). For each OLR, two WAS were studied. The change in OLR led to differentiated fermentation product profile without compromising the fermentation yields (∼300 mgCOD/gVS). At 11 gVS/(L·d), the product profile was dominated by acetic, butyric, and propionic acids while at 18 gVS/(L·d) it shifted to acetic acid, ethanol, and caproic acid. Reverting the OLR also reverted the fermentation profile. The biomass immigration with the WAS changed the fermentation microbial structure and introduced acetic acid-consuming methanogens, which growth was only delayed by the OLR increase. Microbial monitoring and post-fermentation tests can be used for early detection of acetic acid-consuming events.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/225054
url https://hdl.handle.net/2445/225054
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.biortech.2024.131034
Bioresource Technology, 2024, vol. 406
https://doi.org/10.1016/j.biortech.2024.131034
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier B.V., 2024
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier B.V., 2024
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Química i Química Analítica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Oviedo (UNIOVI)
instname_str Universidad de Oviedo (UNIOVI)
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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