Comparison of UASB and fluidized-bed reactors for sulfate reduction.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorBertolino, Sueli Moura-
Autor(es): dc.creatorSilva, Larissa A. M.-
Autor(es): dc.creatorAquino, Sergio Francisco de-
Autor(es): dc.creatorLeão, Versiane Albis-
Data de aceite: dc.date.accessioned2019-11-06T13:35:34Z-
Data de disponibilização: dc.date.available2019-11-06T13:35:34Z-
Data de envio: dc.date.issued2015-12-02-
Data de envio: dc.date.issued2015-12-02-
Data de envio: dc.date.issued2015-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/5872-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/558899-
Descrição: dc.descriptionReactor hydrodynamics is important for sulfidogenesis because sulfate reduction bacteria (SRB) do not granulate easily. In this work, the sulfate reduction performance of two continuous anaerobic bioreactors was investigated: (i) an upflow anaerobic sludge blanket (UASB) reactor and (ii) a fluidized bed reactor (FBR). Organic loading, sulfate reduction, and COD removal were the main parameters monitored during lactate and glycerol degradation. The UASB reactor with biomass recirculation showed a specific sulfate reduction rate of 0.089±0.014 g.gSSV-1.d-1 (89% reduction), whereas values twice as high were achieved in the FBR treating either lactate (0.200±0.017 g.gSSV-1.d-1) or glycerol (0.178±0.010 g.gSSV-1.d-1). Sulfate reduction with pure glycerol produced a smaller residual COD (1700 mg.L-1) than that produced with lactate (2500 mg.L-1) at the same COD.sulfate-1 mass ratio. It was estimated that 50% of glycerol degradation was due to sulfate reduction and 50% to fermentation, which was supported by the presence of butyrate in the FBR effluent. The UASB reactor was unable to produce effluents with sulfate concentrations below 250 mg.L-1 due to poor mixing conditions, whereas the FBR consistently ensured residual sulfate concentrations below such a value.-
Idioma: dc.languageen-
Direitos: dc.rightsTodo o conteúdo do periódico Brazilian Journal of Chemical Engineering, exceto onde identificado, está licenciado sob uma licença Creative Commons que permite copiar, distribuir e transmitir o trabalho em qualquer suporte ou formato desde que sejam citados o autor e o licenciante. Fonte: <http://www.scielo.br/scielo.php?script=sci_serial&pid=0104-6632&lng=en&nrm=iso>. Acesso em: 21 out. 2015.-
Palavras-chave: dc.subjectSulfate reduction-
Palavras-chave: dc.subjectAnaerobic processes-
Palavras-chave: dc.subjectGlycerol-
Palavras-chave: dc.subjectUpflow anaerobic sludge blanket-
Palavras-chave: dc.subjectWasterwater treatment-
Título: dc.titleComparison of UASB and fluidized-bed reactors for sulfate reduction.-
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