Bioaugmented membrane bioreactor (MBR) with a GAC-packed zone for high rate textile wastewater treatment

WATER RESEARCH

卷:45

Article

Hai, Faisal Ibney¹  Yamamoto, Kazuo¹  Nakajima, Fumiyuki¹  Fukushi, Kensuke² 

[1] Univ Tokyo, Ctr Environm Sci, Bunkyo Ku, Tokyo 1130033, Japan

[2] Univ Tokyo, Bunkyo Ku, Tokyo 1138654, Japan

关键词: Anaerobic decoloration;    Granular activated carbon (GAC);    Membrane bioreactor (MBR);    Textile wastewater;    White-rot fungi;   

DOI  :  10.1016/j.watres.2011.01.013

来源: Elsevier

【 摘 要 】

The long-term performance of a bioaugmented membrane bioreactor (MBR) containing a GAC-packed anaerobic zone for treatment of textile wastewater containing structurally different azo dyes was observed. A unique feeding strategy, consistent with the mode of evolution of separate waste streams in textile plants, was adopted to make the best use of the GAC-zone for dye removal. Dye was introduced through the GAC-zone while the rest of the colorless media was simultaneously fed through the aerobic zone. Preliminary experiments confirmed the importance of coupling the GAC-amended anaerobic zone to the aerobic MBR and also evidenced the efficacy of the adopted feeding strategy. Following this, the robustness of the process under gradually increasing dye-loading was tested. The respective average dye concentrations (mg/L) in the sample from GAC-zone and the membrane-permeate under dye-loadings of 0.1 and 1 g/L.d were as follows: GAC-zone (3, 105), permeate (0, 5). TOC concentration in membrane-permeate for the aforementioned loadings were 3 and 54 mg/L, respectively. Stable decoloration along with significant TOC removal during a period of over 7 months under extremely high dye-loadings demonstrated the superiority of the proposed hybrid process. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

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