Caproic acid production is linked to biomass activity during xylose fermentation

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dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Enxeñaría Química
dc.contributor.affiliationUniversidade de Santiago de Compostela. Centro Interdisciplinar de Investigación en Tecnoloxías Ambientais (CRETUS)
dc.contributor.authorIglesias Riobó, Juan
dc.contributor.authorMauricio Iglesias, Miguel
dc.contributor.authorCarballa Arcos, Marta
dc.date.accessioned2024-12-13T12:59:00Z
dc.date.available2024-12-13T12:59:00Z
dc.date.issued2025-02
dc.description.abstractThis study aims at addressing inconsistencies in literature regarding the organic loading rate (OLR) and hydraulic retention time (HRT) effect on caproic acid production, using biomass activity as an indicator. Xylose was fully consumed in the reference CSTR and SBR (HRT = 1-day; OLR = 12 g COD/(L·d)), but different caproic acid yields (0.02 vs 0.11 Cmol/Cmol-s) were observed, which was linked to differences in biomass activity (12 vs 3.5 g/(g VSS·d)). At HRT 0.5 days, xylose conversion was incomplete and lactic acid and ethanol appeared, reducing caproic acid production. However, increasing xylose concentration in the feeding to 24 g COD/L did not change the caproic acid yield (0.12 Cmol/Cmol-s), which was explained by similar biomass activity as in the reference SBR (4.8 g/(g VSS·d)). These findings indicate that the SBR is the optimal configuration, since it allows maintaining a low biomass activity and therefore a high caproic acid yield.
dc.description.peerreviewedSI
dc.description.sponsorshipThis research was framed in CELL4CHEM project (PCI2021-121989, ERACoBioTech 3rd call) funded by MICIU/AEI/10.13039/501100011033 and the European Union NextGenerationEU/PRTR. The authors belong to a Galician Competitive Research Group (ED431C-2021/37)
dc.identifier.citationBioresource Technology Volume 418, February 2025, 131952
dc.identifier.doi10.1016/j.biortech.2024.131952
dc.identifier.essn1873-2976
dc.identifier.urihttps://hdl.handle.net/10347/38164
dc.journal.titleBioresource Technology
dc.language.isoeng
dc.publisherElsevier
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2021-121989/ES/ENGINEERING MICROBIAL COMMUNITIES FOR THE CONVERSION OF LIGNOCELLULOSE INTO MEDIUM-CHAIN CARBOXYLATES/
dc.relation.publisherversionhttps://doi.org/10.1016/j.biortech.2024.131952
dc.rights© 2024 The Author(s). Published by Elsevier Ltd. Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCSTR
dc.subjectHydraulic retention time
dc.subjectOrganic loading rate
dc.subjectSBR
dc.subjectSolid retention time
dc.titleCaproic acid production is linked to biomass activity during xylose fermentation
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number418
dspace.entity.typePublication
relation.isAuthorOfPublicationb098e7de-f49e-4335-9f8d-d70a445f4a69
relation.isAuthorOfPublicationf574e8ce-1a88-4045-bc74-d48db358fc70
relation.isAuthorOfPublication.latestForDiscoveryb098e7de-f49e-4335-9f8d-d70a445f4a69

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