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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/70840
Title: 
Anaerobic treatment of wastewater from coffee pulping in upflow anaerobic sludge blanket (UASB) in two stages
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
Abstract: 
In this work, the efficiency of two-stage upflow anaerobic sludge blanket (UASB) reactors was evaluated in bench scale, for treating a liquid effluent from coffee pulping. Hydraulic detention times (HDT) were 4.0; 5.2 and 6.2 days, resulting in organic loading rates (OLR) of 5.8; 3.6 and 3.0g total COD per (L-d) in the first reactor (Rl) and HDT of 2.0; 2.6 and 3.1 days with OLR of 5.8; 0.5 and 0.4 g total COD per (L-d) in the second reactor (R2). The medium values of total COD affluent varied from 15.440 to 23.040 mg O 2/L, and in the effluent to the reactors 1 and 2 were from l.lOO to 11.500 mg 0 2/L and 420 to 9.000 mg O 2/L, respectively. The medium values of removal efficiencies of total COD and TSS varied from 66 to 98% and 93 to 97%, respectively, in the system of treatment with the UASB reactors, in two stages. The content of methane in the biogas varied from 69 to 89% in the Rl and from 52 to 73% in the R2. The maximum volumetric methane production of 0.483 m 3 CH 4per (m 3 reactor d) was obtained with OLR of 3.6 g total COD per (L reactor d) and HDT of 6.2 days in the Rl. The volatile fatty acids concentration was kept below 100mg/L with HDT of 5.2 and 6.2 days in the Rl and HDT of 2.6 and 3.1 days in the R2.
Issue Date: 
1-Dec-2008
Citation: 
Livestock Environment VIII - Proceedings of the 8th International Symposium, p. 191-198.
Time Duration: 
191-198
Keywords: 
  • Anaerobic digestion
  • Coffee wastewater
  • Phenols
  • Anaerobic treatments
  • Liquid effluents
  • Methane productions
  • Organic loading rates
  • Removal efficiencies
  • Two stages
  • Uasb reactors
  • Up-flow anaerobic sludge blanket reactors
  • Up-flow anaerobic sludge blankets
  • Volatile fatty acids
  • Agriculture
  • Biogas
  • Chemical oxygen demand
  • Effluents
  • Fatty acids
  • Methane
  • Removal
  • Wastewater
  • Wastewater treatment
Source: 
https://elibrary.asabe.org/azdez.asp?JID=1&AID=25498&CID=lenv2009&T=2
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/70840
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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