Enhancement of methane production from long chain fatty acid based effluents

Detalhes bibliográficos
Autor(a) principal: Cavaleiro, A. J.
Data de Publicação: 2008
Outros Autores: Pereira, M. A., Alves, M. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/7792
Resumo: Two anaerobic sludges previously loaded with oleate and palmitate accumulated 4570 ± 257 and 5200 ± 9 mgCOD-LCFA gVSS−1, respectively. These sludges were incubated in batch assays and methane production was recorded after addition of 100–900 mg L−1 of oleate and palmitate, respectively. The batch assays were conducted before and after allowing the depletion of the biomass-associated LCFA. The presence of biomass-associated LCFA decreased the capacity of both sludges to convert the added LCFA to methane. After the degradation of biomass-associated LCFA, the lag phases observed before the onset of methane production were significantly reduced, evidencing an increase in the tolerance of the acetotrophic methanogens to the presence of LCFA. In another experiment, three recurrent pulses were performed with a real dairy wastewater containing 3.6 gCOD L−1, from which 53% was fat. Methane yields of 0.45 ± 0.01, 0.88 ± 0.02 and 1.29 ± 0.08 gCOD- CH4 gCODfed-1 were achieved in the first, second and third pulses, respectively, evidencing an increasing capacity of the sludge to convert substrate accumulated in previous additions.
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spelling Enhancement of methane production from long chain fatty acid based effluentsOleic acidPalmitic acidAnaerobic biodegradationPulse feedingDairy wastewaterScience & TechnologyTwo anaerobic sludges previously loaded with oleate and palmitate accumulated 4570 ± 257 and 5200 ± 9 mgCOD-LCFA gVSS−1, respectively. These sludges were incubated in batch assays and methane production was recorded after addition of 100–900 mg L−1 of oleate and palmitate, respectively. The batch assays were conducted before and after allowing the depletion of the biomass-associated LCFA. The presence of biomass-associated LCFA decreased the capacity of both sludges to convert the added LCFA to methane. After the degradation of biomass-associated LCFA, the lag phases observed before the onset of methane production were significantly reduced, evidencing an increase in the tolerance of the acetotrophic methanogens to the presence of LCFA. In another experiment, three recurrent pulses were performed with a real dairy wastewater containing 3.6 gCOD L−1, from which 53% was fat. Methane yields of 0.45 ± 0.01, 0.88 ± 0.02 and 1.29 ± 0.08 gCOD- CH4 gCODfed-1 were achieved in the first, second and third pulses, respectively, evidencing an increasing capacity of the sludge to convert substrate accumulated in previous additions.Fundo Social Europeu (FSE)Fundação para a Ciência e a Tecnologia (FCTElsevier Ltd.Universidade do MinhoCavaleiro, A. J.Pereira, M. A.Alves, M. M.2008-072008-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/7792eng"Bioresource Technology". ISSN 0960-8524. 99:10 (Jul. 2008) 4086-4095.0960-852410.1016/j.biortech.2007.09.00518006304info: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:RCAAP2023-07-21T12:13:19Zoai:repositorium.sdum.uminho.pt:1822/7792Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:05:23.239760Repositório 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 Enhancement of methane production from long chain fatty acid based effluents
title Enhancement of methane production from long chain fatty acid based effluents
spellingShingle Enhancement of methane production from long chain fatty acid based effluents
Cavaleiro, A. J.
Oleic acid
Palmitic acid
Anaerobic biodegradation
Pulse feeding
Dairy wastewater
Science & Technology
title_short Enhancement of methane production from long chain fatty acid based effluents
title_full Enhancement of methane production from long chain fatty acid based effluents
title_fullStr Enhancement of methane production from long chain fatty acid based effluents
title_full_unstemmed Enhancement of methane production from long chain fatty acid based effluents
title_sort Enhancement of methane production from long chain fatty acid based effluents
author Cavaleiro, A. J.
author_facet Cavaleiro, A. J.
Pereira, M. A.
Alves, M. M.
author_role author
author2 Pereira, M. A.
Alves, M. M.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Cavaleiro, A. J.
Pereira, M. A.
Alves, M. M.
dc.subject.por.fl_str_mv Oleic acid
Palmitic acid
Anaerobic biodegradation
Pulse feeding
Dairy wastewater
Science & Technology
topic Oleic acid
Palmitic acid
Anaerobic biodegradation
Pulse feeding
Dairy wastewater
Science & Technology
description Two anaerobic sludges previously loaded with oleate and palmitate accumulated 4570 ± 257 and 5200 ± 9 mgCOD-LCFA gVSS−1, respectively. These sludges were incubated in batch assays and methane production was recorded after addition of 100–900 mg L−1 of oleate and palmitate, respectively. The batch assays were conducted before and after allowing the depletion of the biomass-associated LCFA. The presence of biomass-associated LCFA decreased the capacity of both sludges to convert the added LCFA to methane. After the degradation of biomass-associated LCFA, the lag phases observed before the onset of methane production were significantly reduced, evidencing an increase in the tolerance of the acetotrophic methanogens to the presence of LCFA. In another experiment, three recurrent pulses were performed with a real dairy wastewater containing 3.6 gCOD L−1, from which 53% was fat. Methane yields of 0.45 ± 0.01, 0.88 ± 0.02 and 1.29 ± 0.08 gCOD- CH4 gCODfed-1 were achieved in the first, second and third pulses, respectively, evidencing an increasing capacity of the sludge to convert substrate accumulated in previous additions.
publishDate 2008
dc.date.none.fl_str_mv 2008-07
2008-07-01T00:00:00Z
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/1822/7792
url http://hdl.handle.net/1822/7792
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Bioresource Technology". ISSN 0960-8524. 99:10 (Jul. 2008) 4086-4095.
0960-8524
10.1016/j.biortech.2007.09.005
18006304
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.publisher.none.fl_str_mv Elsevier Ltd.
publisher.none.fl_str_mv Elsevier Ltd.
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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