A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.14/32773 |
Resumo: | This 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. |
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A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentationAcid hydrolysisAcidogenic fermentationBrewer’s spent grain (BSG)Organic loadPHThis 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.Veritati - Repositório Institucional da Universidade Católica PortuguesaGuarda, Eliana C.Oliveira, Ana CatarnaAntunes, SílviaFreitas, FilomenaCastro, Paula M. L.Duque, Anouk F.Reis, Maria A. M.2021-04-27T16:13:59Z2021-04-032021-04-03T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/32773eng2076-341710.3390/app1107322285104083541000638308200001info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-10-24T01:34:05Zoai:repositorio.ucp.pt:10400.14/32773Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:26:30.227981Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
title |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
spellingShingle |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation Guarda, Eliana C. Acid hydrolysis Acidogenic fermentation Brewer’s spent grain (BSG) Organic load PH |
title_short |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
title_full |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
title_fullStr |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
title_full_unstemmed |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
title_sort |
A two-stage process for conversion of brewer’s spent grain into volatile fatty acids through acidogenic fermentation |
author |
Guarda, Eliana C. |
author_facet |
Guarda, Eliana C. Oliveira, Ana Catarna Antunes, Sílvia Freitas, Filomena Castro, Paula M. L. Duque, Anouk F. Reis, Maria A. M. |
author_role |
author |
author2 |
Oliveira, Ana Catarna Antunes, Sílvia Freitas, Filomena Castro, Paula M. L. Duque, Anouk F. Reis, Maria A. M. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Veritati - Repositório Institucional da Universidade Católica Portuguesa |
dc.contributor.author.fl_str_mv |
Guarda, Eliana C. Oliveira, Ana Catarna Antunes, Sílvia Freitas, Filomena Castro, Paula M. L. Duque, Anouk F. Reis, Maria A. M. |
dc.subject.por.fl_str_mv |
Acid hydrolysis Acidogenic fermentation Brewer’s spent grain (BSG) Organic load PH |
topic |
Acid hydrolysis Acidogenic fermentation Brewer’s spent grain (BSG) Organic load PH |
description |
This 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. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-04-27T16:13:59Z 2021-04-03 2021-04-03T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.14/32773 |
url |
http://hdl.handle.net/10400.14/32773 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2076-3417 10.3390/app11073222 85104083541 000638308200001 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799131981565394944 |