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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
19/12/2017 |
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Data da última atualização: |
02/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
AMORIM, M. C. C.; SILVA, P. T. de S. e; GAVAZZA, S.; MOTTA SOBRINHO, M. A. |
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Afiliação: |
MIRIAM C. C. AMORIM, Professora da UNIVASF; PAULA TEREZA DE SOUZA E SILVA, CPATSA; SAVIA GAVAZZA, Universidade Federal de Pernambuco; MAURCIO ALVES MOTTA SOBRINHO, Universidade Federal de Pernambuco. |
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Título: |
Viability of rapid startup and operation of UASB reactors for the treatment of cassava wastewater in the Semi-Arid region of Northeastern Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Canadian Journal of Chemical Engineering, v. 96, p. 1036-1044, may, 2018. |
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DOI: |
10.1002/cjce.23041 |
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Idioma: |
Inglês |
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Conteúdo: |
The production of cassava flour generates wastewater with a high concentration of organic matter and nutrients, which gives this effluent potential as a source of both bioenergy and pollution. Thus, cassava wastewater needs to be properly treated prior to release into the environment. Different treatment processes are employed for this purpose, but studies involving up-flow anaerobic sludge blanket (UASB) reactors without modifications are scarce due to the rapid acidification of cassava wastewater. Thus, the aim of the present study was to evaluate the rapid startup of UASB reactors at 30 °C for the cassava wastewater treatment. The reactor was operated under eight different conditions with a hydraulic retention time (HRT) of 8 or 12 h and organic loading rates (OLR) of 12.0 or 15.5 g COD · L−1 · d−1. The systems were evaluated based on chemical oxygen demand (COD) removal, the production of methane, and the stability of the volatile fatty acids/total alkalinity ratio. The UASB system with the best performance was that with the 8 h HRT and OLR of 12.0 g COD · L−1 · d−1, with COD removal rates ranging from 71 to 80 % and methane production of 0.260 L CH4 · g −1 CODremoved. The system offers a real-scale prospect and is a promising option for the replacement of firewood in cassava flour toasting ovens, thereby contributing to the preservation of the semi-arid Caatinga biome in northeastern Brazil. MenosThe production of cassava flour generates wastewater with a high concentration of organic matter and nutrients, which gives this effluent potential as a source of both bioenergy and pollution. Thus, cassava wastewater needs to be properly treated prior to release into the environment. Different treatment processes are employed for this purpose, but studies involving up-flow anaerobic sludge blanket (UASB) reactors without modifications are scarce due to the rapid acidification of cassava wastewater. Thus, the aim of the present study was to evaluate the rapid startup of UASB reactors at 30 °C for the cassava wastewater treatment. The reactor was operated under eight different conditions with a hydraulic retention time (HRT) of 8 or 12 h and organic loading rates (OLR) of 12.0 or 15.5 g COD · L−1 · d−1. The systems were evaluated based on chemical oxygen demand (COD) removal, the production of methane, and the stability of the volatile fatty acids/total alkalinity ratio. The UASB system with the best performance was that with the 8 h HRT and OLR of 12.0 g COD · L−1 · d−1, with COD removal rates ranging from 71 to 80 % and methane production of 0.260 L CH4 · g −1 CODremoved. The system offers a real-scale prospect and is a promising option for the replacement of firewood in cassava flour toasting ovens, thereby contributing to the preservation of... Mostrar Tudo |
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Palavras-Chave: |
COD; Reactores UASB; Semiarido. |
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Thesagro: |
Água; Águas residuais; Mandioca. |
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Thesaurus NAL: |
Cassava; Methane; Volatile fatty acids; Wastewater. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02438naa a2200289 a 4500
001 2082941
005 2018-05-02
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1002/cjce.23041$2DOI
100 1 $aAMORIM, M. C. C.
245 $aViability of rapid startup and operation of UASB reactors for the treatment of cassava wastewater in the Semi-Arid region of Northeastern Brazil.$h[electronic resource]
260 $c2018
520 $aThe production of cassava flour generates wastewater with a high concentration of organic matter and nutrients, which gives this effluent potential as a source of both bioenergy and pollution. Thus, cassava wastewater needs to be properly treated prior to release into the environment. Different treatment processes are employed for this purpose, but studies involving up-flow anaerobic sludge blanket (UASB) reactors without modifications are scarce due to the rapid acidification of cassava wastewater. Thus, the aim of the present study was to evaluate the rapid startup of UASB reactors at 30 °C for the cassava wastewater treatment. The reactor was operated under eight different conditions with a hydraulic retention time (HRT) of 8 or 12 h and organic loading rates (OLR) of 12.0 or 15.5 g COD · L−1 · d−1. The systems were evaluated based on chemical oxygen demand (COD) removal, the production of methane, and the stability of the volatile fatty acids/total alkalinity ratio. The UASB system with the best performance was that with the 8 h HRT and OLR of 12.0 g COD · L−1 · d−1, with COD removal rates ranging from 71 to 80 % and methane production of 0.260 L CH4 · g −1 CODremoved. The system offers a real-scale prospect and is a promising option for the replacement of firewood in cassava flour toasting ovens, thereby contributing to the preservation of the semi-arid Caatinga biome in northeastern Brazil.
650 $aCassava
650 $aMethane
650 $aVolatile fatty acids
650 $aWastewater
650 $aÁgua
650 $aÁguas residuais
650 $aMandioca
653 $aCOD
653 $aReactores UASB
653 $aSemiarido
700 1 $aSILVA, P. T. de S. e
700 1 $aGAVAZZA, S.
700 1 $aMOTTA SOBRINHO, M. A.
773 $tCanadian Journal of Chemical Engineering$gv. 96, p. 1036-1044, may, 2018.
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Embrapa Semiárido (CPATSA) |
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