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A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation

2021-04-03Journal article Open access
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dc.contributor.authorGuarda, Eliana C.
dc.contributor.authorOliveira, Ana Catarna
dc.contributor.authorAntunes, Sílvia
dc.contributor.authorFreitas, Filomena
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorDuque, Anouk F.
dc.contributor.authorReis, Maria A. M.
dc.date.accessioned2021-04-27T16:13:59Z
dc.date.available2021-04-27T16:13:59Z
dc.date.issued2021-04-03
dc.description.abstractThis work is focused on the valorization of brewer’s spent grains (BSG) into volatile fatty acids (VFA) through acidogenic fermentation. VFAs are building blocks for several applications, such as bioplastics’ production. Using acid hydrolysis as pre-treatment, several batch assays were performed and the impact of organic load (OL) and pH on VFA production from BSG hydrolysate was assessed. Regardless of the condition, the produced acids were mainly butyric and acetic acids followed by propionic acid. The OL had a direct impact on the total organic acid concentration with higher concentrations at the highest OL (40 gCOD L-1). pH affected the concentration of individual organic acid, with the highest fermentation products (FP) diversity attained at pH 5.0 and OL of 40 gCOD L-1. To assess the potential application of organic acids for biopolymers (such as polyhydroxyalkanoates) production, the content in hydroxybutyrate (HB) and hydroxyvalerate (HV) monomers was estimated from the respective precursors produced at each pH and OL. The content in HV precursors increased with pH, with a maximum at pH 6.0 (ca. 16% C-mol basis). The acidogenic fermentation of BSG hydrolysate was also assessed in continuous operation, using an expanded granular sludge bed reactor (EGSB). It was shown that the BSG hydrolysate was successfully converted to VFAs without pH control, achieving higher productivities than in the batch operation mode.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/app11073222pt_PT
dc.identifier.eid85104083541
dc.identifier.issn2076-3417
dc.identifier.urihttp://hdl.handle.net/10400.14/32773
dc.identifier.wos000638308200001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAcid hydrolysispt_PT
dc.subjectAcidogenic fermentationpt_PT
dc.subjectBrewer’s spent grain (BSG)pt_PT
dc.subjectOrganic loadpt_PT
dc.subjectPHpt_PT
dc.titleA two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentationpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue7pt_PT
oaire.citation.titleApplied Sciences (Switzerland)pt_PT
oaire.citation.volume11pt_PT
person.familyNameFreitas
person.familyNameCastro
person.familyNameF. Duque
person.familyNameReis
person.givenNameFilomena
person.givenNamePaula
person.givenNameAnouk
person.givenNameMaria A.
person.identifier2013444
person.identifier.ciencia-id9215-70D3-D42E
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.ciencia-id7819-FA0D-FC04
person.identifier.ciencia-id2813-8333-637F
person.identifier.orcid0000-0002-9430-4640
person.identifier.orcid0000-0001-8841-6606
person.identifier.orcid0000-0002-8360-1404
person.identifier.orcid0000-0003-4000-1836
person.identifier.ridK-1828-2012
person.identifier.ridM-8241-2013
person.identifier.ridN-5863-2014
person.identifier.ridD-8303-2013
person.identifier.scopus-author-id36861977100
person.identifier.scopus-author-id7102781782
person.identifier.scopus-author-id36573459300
person.identifier.scopus-author-id7102676470
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicationf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isAuthorOfPublicationd23f1d0d-9558-4f84-aa79-1efc0552f360
relation.isAuthorOfPublicationcf71b441-bea4-45ba-afb4-899de7827499
relation.isAuthorOfPublication.latestForDiscoveryf2253992-dc8d-4042-9a0f-597ebcf0a1d6

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