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Valorization of raw brewers' spent grain through the production of volatile fatty acids

2020-07Journal article Restricted access
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dc.contributor.authorRibau Teixeira, Margarida
dc.contributor.authorGuarda, Eliana C.
dc.contributor.authorFreitas, Elisabete B.
dc.contributor.authorGalinha, Claudia F.
dc.contributor.authorDuque, Anouk F.
dc.contributor.authorReis, Maria A. M.
dc.date.accessioned2021-06-24T11:35:24Z
dc.date.available2021-06-24T11:35:24Z
dc.date.issued2020-07
dc.description.abstractThis work is focused on production of volatile fatty acids (VFA) through anaerobic digestion (AD) using raw (without pre-treatment) brewers' spent grain (BSG) as feedstock. VFAs are by-products from AD of organic wastes with wide potential industrial application in bioplastic production. A long term fed batch stirred-tank reactor was operated and the impact of three hydraulic retention times (HRT) and two organic loading rates (OLR) on VFA production was assessed. Results showed clearly that AD of raw BSG is possible without a pretreatment step. The maximum volumetric VFA productivity of 91.3 +/- 9.1 mgCODL(-1) h(-1) and VFA concentration of 24.9 +/- 2.6 g L-1 were obtained for 16 days of HRT and 16 gTS(in)L(-1)d(-1) of OLR. This is the highest value of VFA concentration so far reported for BSG. Propionic, acetic and butyric acids were the main VFAs produced. Community identification by FISH and its correlation with process parameters was performed by principal component analysis.
dc.description.sponsorshipApplied Molecular Biosciences Unit-UCIBIO - FCT/MCTES [UID/Multi/04378/2019]
dc.description.sponsorshipAssociate Laboratory for Green Chemistry-LAQV - FCT/MCTES [UID/Multi/04378/2019]
dc.description.sponsorshipFundacao para a Ciencia e a Tecnologia (FCT)Portuguese Foundation for Science and TechnologyEuropean Commission [PTDC/BTA-BTA/31746/2017, SFRH/BPD/88705/2012, SFRH/BD/136300/2018]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.nbt.2020.01.007
dc.identifier.issn1871-6784
dc.identifier.urihttp://hdl.handle.net/10400.1/16430
dc.language.isoeng
dc.peerreviewedyes
dc.publisherELSEVIER
dc.subjectAcidogenic fermentation
dc.subjectOrganic acids
dc.subjectBrewers' spent grain
dc.subjectVolatile fatty acids
dc.subjectMicrobial population dynamics
dc.subject.otherBiochemistry & molecular biology
dc.titleValorization of raw brewers' spent grain through the production of volatile fatty acids
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage10
oaire.citation.startPage4
oaire.citation.titleNew Biotechnology
oaire.citation.volume57
person.familyNameRibau Teixeira
person.givenNameMargarida
person.identifier.ciencia-id9111-87FB-26AA
person.identifier.orcid0000-0002-2153-3282
person.identifier.ridB-9012-2012
person.identifier.scopus-author-id8988625600
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicationadfcbe65-54a7-4cce-b874-bb8e2bdc6167
relation.isAuthorOfPublication.latestForDiscoveryadfcbe65-54a7-4cce-b874-bb8e2bdc6167

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