Data/hora: 02/06/2024 15:53:03

Provedor de dados: 	Engenharia Agrícola	
País: 	Brazil	
Título: 	Performance of UASB reactors in two stages followed by post-treatment with activated sludge in wastewater batch of wet-processed coffee	
Autores: 	Bruno,Marcelo; Oliveira,Roberto A. de.	
Data: 	2013-08-01	
Ano: 	2013	
Palavras-chave: 	Anaerobic digestion; Methane; Nitrogen; Phosphorus; Phenols.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400020	
Editor: 	Associação Brasileira de Engenharia Agrícola	
Relação: 	10.1590/S0100-69162013000400020	
Formato: 	text/html	
Fonte: 	Engenharia Agrícola  v.33 n.4 2013	
Fonte: 	info:eu-repo/semantics/openAccess