| Registro completo |
| Provedor de dados: |
REA
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| País: |
Brazil
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| Título: |
Performance of UASB reactors in two stages followed by post-treatment with activated sludge in wastewater batch of wet-processed coffee
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| Autores: |
Bruno,Marcelo
Oliveira,Roberto A. de
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| Data: |
2013-08-01
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| Ano: |
2013
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| Palavras-chave: |
Anaerobic digestion
Methane
Nitrogen
Phosphorus
Phenols
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| Resumo: |
In this study it was evaluated the efficiency of the treatment of wet-processed coffee wastewater in upflow anaerobic sludge blanket (UASB) reactors in two stages, in bench scale, followed by post-treatment with activated sludge in batch. The first UASB reactor was submitted to an hydraulic retention time (HRT) of 6.2 d and organic loading rates (OLR) of 2.3 and 4.5g CODtotal (L d)-1, and the second UASB reactor to HRT of 3.1 d with OLR of 0.4 and 1.4g CODtotal (L d)-1. The average values of the affluent CODtotal increased from 13,891 to 27,926mg L-1 and the average efficiencies of removal of the CODtotal decreased from 95 to 91%, respectively, in the UASB reactors in two stages. The volumetric methane production increased from 0.274 to 0.323L CH4 (L reactor d)-1 with increment in the OLR. The average concentrations of total phenols in the affluent were of 48 and 163mg L-1, and the removal efficiencies in the UASB reactors in two stages of 92 and 90%, respectively, and increased to 97% with post-treatment. The average values of the removal efficiencies of total nitrogen and phosphorus were of 57 to 80% and 44 to 60%, respectively, in the UASB reactors in two stages and increased to 91 and 84% with the post-treatment.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400020
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| Editor: |
Associação Brasileira de Engenharia Agrícola
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| Relação: |
10.1590/S0100-69162013000400020
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| Formato: |
text/html
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| Fonte: |
Engenharia Agrícola v.33 n.4 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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