Estudo do desempenho do reator "air-lift" de circulação externa no tratamento de aguas residuarias por lodo ativado
AUTOR(ES)
Tania Maria Alberte
DATA DE PUBLICAÇÃO
1997
RESUMO
The wastewater treatment process in activated sludge was carried out in an air-lift reactor with external loop using a synthetic wastewater with a chemical oxygen demand of 1040mgDQO.I-1 approximately. The purpouse of this work was to conduct an investigation about the air-lift reactor potential in wastewater treatment process. The suspended solids concentration chanded from 1200 to 3000mg. I-1. After adaptation of activated sludge in synthetic wastewater experiments were carried out in 1,5 liters air-lift reactor with external loop and nominal diameter of 1.5in. The reactor was operated in continuous form until steady¬ state conditions when the eficiency of process (η) and substrate removal rate constant (K) was determinated, with gas flow rate from 198 to 474ml.min-1 and hydraulic residence time from 3 to 7 hours. The oxigen transfer coefficient was determinated with sulfite solution ranged from 105.41 to 221.38 h-1 and gas hold-up ranged from 2.13 to 4.10 for gas flow rate used. Using a synthetic wastewater feed solution in air-lift reactor of 330ml.h-1 and chemical oxygen demand of 1040mgDQO.I-1, final chemical oxygen demand 150mgDQO. I-1 and final solids concentration of 400mg. I-1 were obtained. These results indicate the potential of the wastewater treatment process by activated sludge in air-lift reactor, with chemical oxygen demand removal rate of 85.6% although a sludge selection occurred during the experiments.
ASSUNTO(S)
aguas residuais - purificação - tratamento biologico lodo
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=000115265Documentos Relacionados
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