Implications of volatile fatty acid profile on the metabolic pathway during continuous sulfate reduction.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorBertolino, Sueli Moura-
Autor(es): dc.creatorRodrigues, Isabel Cristina Braga-
Autor(es): dc.creatorCota, Renata Guerra de Sá-
Autor(es): dc.creatorAquino, Sergio Francisco de-
Autor(es): dc.creatorLeão, Versiane Albis-
Data de aceite: dc.date.accessioned2019-11-06T13:32:38Z-
Data de disponibilização: dc.date.available2019-11-06T13:32:38Z-
Data de envio: dc.date.issued2015-03-06-
Data de envio: dc.date.issued2015-03-06-
Data de envio: dc.date.issued2012-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4560-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557674-
Descrição: dc.descriptionVolatile fatty acid (VFA) profile is an important parameter in anaerobic reactors because it enables the assessment of metabolic pathways. Volatile fatty acids were monitored during sulfate reduction in a UASB (upflow anaerobic sludge blanket) reactor treating 2 g/L sulfate concentration and with the organic loading increasing from 3.5 kg COD/m3 d to 5.9 kg COD/m3 d, for a 1-day residence time. In the absence of recirculation, the best outcome (65% reduction) was noticed with the lowest organic loading (3.55 kg/m3 d). When recirculation was applied, sulfate reduction yields increased to 89%, corresponding to a sulfate removal rate of 1.94 kg SO4 2_/m3 d. The reactor performance was discussed in relation to microbial diversity and metabolic pathways. At high organic loading, two metabolic pathways account for lactate degradation: (i) lactate is oxidized to acetate and carbon dioxide by the incomplete-oxidizer SRB (sulfate-reducing bacteria) Desulfomonas, Desulfovibrio, Desulfolobus, Desulfobulbus and Desulfotomaculum spp.; (ii) lactate is converted to acetate by fermenting bacteria such as Clostridium sp. High propionate concentrations imply that there are low sulfate reduction efficiencies.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Environmental Management concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3547700070746.-
Palavras-chave: dc.subjectSulfate reduction-
Palavras-chave: dc.subjectLactate-
Palavras-chave: dc.subjectPropionate-
Palavras-chave: dc.subjectFermentation-
Palavras-chave: dc.subjectMetabolic pathways-
Título: dc.titleImplications of volatile fatty acid profile on the metabolic pathway during continuous sulfate reduction.-
Aparece nas coleções:Repositório Institucional - UFOP

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