| Registro completo |
| Provedor de dados: |
REA
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| País: |
Brazil
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| Título: |
EFFECT OF AERATION AND RECIRCULATION IN THE REMOVAL OF NITROGEN AND CHEMICAL OXYGEN DEMAND FROM SANITARY SEWAGE IN A STRUCTURED BED REACTOR
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| Autores: |
Leick,Sheilla A.
Oliveira,João G B. De
Tavares,Karoline A.
Lopes,Deize D.
Barana,Ana C.
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| Data: |
2017-12-01
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| Ano: |
2017
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| Palavras-chave: |
Bioreactor
Wastewater
Denitrification
Nitrification
SND (Simultaneous Nitrification and Denitrification)
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| Resumo: |
ABSTRACT This study aimed to evaluate a structured bed reactor with intermittent aeration in the simultaneous removal of Chemical Oxygen Demand (COD) and Total Nitrogen (TN) from sanitary sewage. The reactor was operated for 339 days with a Hydraulic Retention Time (HRT) of 12 hours, temperature of 30 ± 1°C and continuous feeding. Nine trials were carried out in which three different effluent recirculation flow (Qr), 3, 2 and 1 time the incoming flow, were evaluated in three different aeration times, of 1h, 2h, and 3h, in 3 hour cycles. The results showed that different recirculation flows and aeration times did not influence the removal of COD, which reached 89%±12. It was observed that the efficiency of TN removal was higher in the tests with higher COD/TKN ratio, between 7.2 and 7.8, reaching TN effluent values of 17 mg.L-1, being 5 mg.L-1 of N-NH4+, 2 mg.L-1 of N-NO2 and 10 mg.L-1 of N-NO3-. It was verified that it is possible to remove the COD and nitrogen from sanitary sewage in a structured bed reactor with intermittent aeration.
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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=S0100-69162017000601236
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| Editor: |
Associação Brasileira de Engenharia Agrícola
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| Relação: |
10.1590/1809-4430-eng.agric.v37n6p1236-1243/2017
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| Formato: |
text/html
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| Fonte: |
Engenharia Agrícola v.37 n.6 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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