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

2021-04-03Artigo científico Acesso aberto
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dc.contributor.authorGuarda, Eliana C.
dc.contributor.authorOliveira, Ana Catarina
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.contributor.institutionDQ - Departamento de Química
dc.contributor.institutionUCIBIO - Applied Molecular Biosciences Unit
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2021-09-04T00:20:28Z
dc.date.available2021-09-04T00:20:28Z
dc.date.issued2021-04-03
dc.description
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.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent1478581
dc.identifier.doi10.3390/app11073222
dc.identifier.issn2076-3417
dc.identifier.otherPURE: 33477152
dc.identifier.otherPURE UUID: 106d710b-3060-4e87-9c94-eed632ad1109
dc.identifier.otherScopus: 85104083541
dc.identifier.otherWOS: 000638308200001
dc.identifier.otherORCID: /0000-0002-9430-4640/work/99432342
dc.identifier.urihttp://hdl.handle.net/10362/123847
dc.identifier.urlhttps://www.scopus.com/pages/publications/85104083541
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/152975/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/OE/71245/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157863/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157549/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157677/PT
dc.subjectAcid hydrolysis
dc.subjectAcidogenic fermentation
dc.subjectBrewer’s spent grain (BSG)
dc.subjectOrganic load
dc.subjectPH
dc.subjectGeneral Materials Science
dc.subjectInstrumentation
dc.subjectGeneral Engineering
dc.subjectProcess Chemistry and Technology
dc.subjectComputer Science Applications
dc.subjectFluid Flow and Transfer Processes
dc.titleA two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentationen
dc.typejournal article
degois.publication.issue7
degois.publication.titleApplied Sciences
degois.publication.volume11
dspace.entity.typePublication
oaire.awardNumber152975
oaire.awardNumber71245
oaire.awardNumber157863
oaire.awardNumber157549
oaire.awardNumber157677
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/152975/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/71245/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157863/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157549/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157677/PT
oaire.fundingStream3599-PPCDT
oaire.fundingStreamOE
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
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