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Título: | Comparison of UASB and fluidized-bed reactors for sulfate reduction. |
Autor(es): | Bertolino, Sueli Moura Silva, Larissa A. M. Aquino, Sergio Francisco de Leão, Versiane Albis |
Palavras-chave: | Sulfate reduction Anaerobic processes Glycerol Upflow anaerobic sludge blanket Wastewater treatment |
Data do documento: | 2015 |
Referência: | BERTOLINO, S. M. et al. Comparison of UASB and fluidized-bed reactors for sulfate reduction. Brazilian Journal of Chemical Engineering, v. 32, n. 1, p. 59-71, 2015. Disponível em: <http://www.scielo.br/pdf/bjce/v32n1/0104-6632-bjce-32-1-0059.pdf>. Acesso em: 21 out. 2015. |
Resumo: | Reactor 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. |
URI: | http://www.repositorio.ufop.br/handle/123456789/5872 |
DOI: | http://dx.doi.org/10.1590/0104-6632.20150321s00003158 |
ISSN: | 0104-6632 |
Licença: | Todo o conteúdo do periódico Brazilian Journal of Chemical Engineering, exceto onde identificado, está sob uma licença Creative Commons 4.0 que permite copiar, distribuir e transmitir o trabalho em qualquer suporte ou formato desde que sejam citados o autor e o licenciante. Não permite o uso para fins comerciais. Fonte: Brazilian Journal of Chemical Engineering <http://www.scielo.br/scielo.php?script=sci_serial&pid=0104-6632&lng=en&nrm=iso>. Acesso em: 20 ago. 2019. |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_ComparisonUasbFluidized.pdf | 786,38 kB | Adobe PDF | Visualizar/Abrir |
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