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Biorreatores com membranas submersas (BRMs): alternativa promissora para o tratamento de esgotos sanitários para reúso

Submerged membrane bioreactor (sMBR): a promising alternative to wastewater treatment for water reuse

Resumos

As tecnologias disponíveis para o tratamento e reúso de água a partir de esgotos sanitários abrangem um vasto número de opções, sendo os Biorreatores com Membranas Submersas considerados elementos chaves pelo papel que podem desempenhar em esquemas de reúso de água. Neste sentido, este estudo teve como objetivo apresentar um entendimento do status atual de aplicação dos BRMs, bem como apresentar os resultados de uma unidade piloto com membranas submersas do tipo placa plana tratando esgoto sanitário proveniente da moradia estudantil e do restaurante universitário da Universidade de São Paulo. A unidade piloto foi operada em condições estacionárias durante um período de 90 dias com uma concentração de 3422 ± 693 mg SST/L. Os resultados obtidos demonstraram que o sistema é capaz de produzir um efluente com baixas concentrações de cor, turbidez, DBO5 e DQO, com valores de 25 uC, 0,29 UNT, 5,5 mg O2/L e 24 mg O2/L, respectivamente. Além disso, as membranas de ultrafiltração utilizadas foram eficientes na remoção de indicadores de organismos patogênicos, com remoção de 7 e 6 log de coliformes termotolerantes e E. coli, resultando em um efluente com concentração de 9,3 ± 21,0 e 1,8 ± 4,0 NMP/100 ml, respectivamente.

tratamento avançado de esgoto; membranas; reúso de água


Treatment technology for wastewater treatment and reuse encompasses a vast number of options, and the Submerged Membrane Bioreactor is regarded as a key element for the role it can play in water reuse schemes. Thus, this study aimed to present and discuss the current status of sMBR implementation, as well as to present the results of a pilot plant with submerged flat sheet membranes treating wastewater from the residence halls and the restaurant of the University of São Paulo. The pilot plant was operated under stationary conditions over a period of 90 days with a concentration of 3422 ± 693 mg TSS/L. The results showed that the system can produce an effluent with low concentrations of color, turbidity, COD and BOD5 with values of 25 uC, 0.29 NTU, 5.5 mg O2/L and 24 mg O2/L, respectively. Furthermore, the ultrafiltration membranes used were able to reduce the density of pathogen indicators, with removal of 7 and 6 log of thermotolerant coliforms and E. coli respectively, resulting with concentrations of 9,3 ± 21,0 e 1,8 ± 4,0 MPN/100 mL, respectively.

advanced wastewater treatment; membranes; water reuse


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Datas de Publicação

  • Publicação nesta coleção
    22 Jan 2014
  • Data do Fascículo
    Dez 2013

Histórico

  • Recebido
    24 Out 2013
  • Aceito
    15 Nov 2013
Instituto de Pesquisas Ambientais em Bacias Hidrográficas Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi), Estrada Mun. Dr. José Luis Cembranelli, 5000, Taubaté, SP, Brasil, CEP 12081-010 - Taubaté - SP - Brazil
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