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Provedor de dados:  REA
País:  Brazil
Título:  Performance of UASB reactors in two stages under different HRT and OLR treating residual waters of swine farming
Autores:  Urbinati,Estevão
Duda,Rose M.
Oliveira,Roberto A. de
Data:  2013-04-01
Ano:  2013
Palavras-chave:  Anaerobic digestion
Swine excrements
Methane gas
UASB reactors in series
Two stage treatments
Resumo:  In this study it was evaluated the effects of hydraulic retention time (HRT) and Organic Loading Rate (OLR) on the performance of UASB (Upflow Anaerobic Sludge Blanket) reactors in two stages treating residual waters of swine farming. The system consisted of two UASB reactors in pilot scale, installed in series, with volumes of 908 and 188 L, for the first and second stages (R1 and R2), respectively. The HRT applied in the system of anaerobic treatment in two stages (R1 + R2) was of 19.3, 29.0 and 57.9 h. The OLR applied in the R1 ranged from 5.5 to 40.1 kg CODtotal (m³ d)-1. The average removal efficiencies of chemical oxygen demand (COD) and total suspended solids (TSS) ranged, respectively, from 66.3 to 88.2% and 62.5 to 89.3% in the R1, and from 85.5 to 95.5% and 76.4 to 96.1% in the system (R1 + R2). The volumetric production of methane in the system (R1 + R2) ranged from 0.295 to 0.721 m³CH4 (m³ reactor d)-1. It was found that the OLR applied were not limiting to obtain high efficiencies of CODtotal and TSS removal and methane production. The inclusion of the UASB reactor in the second stage contributed to increase the efficiencies of CODtotal and TSS removal, especially, when the treatment system was submitted to the lowest HRT and the highest OLR.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Associação Brasileira de Engenharia Agrícola
Relação:  10.1590/S0100-69162013000200015
Formato:  text/html
Fonte:  Engenharia Agrícola v.33 n.2 2013
Direitos:  info:eu-repo/semantics/openAccess

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