A two-stage membrane bioreactor system was applied to the treatment of partially stabilized leachate from solid waste landfill in Thailand. In the system, an anoxic tank with incline tube for biomass separation from re-circulated sludge is followed by a second-stage aerobic tank in which a direct submerged hollow-fiber membrane module is used for solid–liquid separation. During steady operation of 200 days, BOD, COD, NH3 and TKN removals were found to be 99.6, 68, 89 and 86% respectively. Determination of nitrogen transforming bacteria by fluorescent in-situ hybridization technique revealed a slightly higher percentage of nitrifying bacteria in the aerobic tank and a higher percentage of denitrifying bacteria in the anoxic tank respectively. Anammox-like bacteria were also detected at relatively high percentage.
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Research Article|
September 01 2011
Treatment performance and microbial characteristics in two-stage membrane bioreactor applied to partially stabilized leachate
C. Chiemchaisri;
1Department of Environmental Engineering/National Center of Excellence for Environmental and Hazardous Waste Management, Faculty of Engineering, Kasetsart University, 50 Phaholyothin Road, Bangkok 10900, Thailand
E-mail: [email protected]
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W. Chiemchaisri;
W. Chiemchaisri
1Department of Environmental Engineering/National Center of Excellence for Environmental and Hazardous Waste Management, Faculty of Engineering, Kasetsart University, 50 Phaholyothin Road, Bangkok 10900, Thailand
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P. Nindee;
P. Nindee
1Department of Environmental Engineering/National Center of Excellence for Environmental and Hazardous Waste Management, Faculty of Engineering, Kasetsart University, 50 Phaholyothin Road, Bangkok 10900, Thailand
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C. Y. Chang;
C. Y. Chang
2Department of Environmental Engineering and Science, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan
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K. Yamamoto
K. Yamamoto
3Environmental Science Center, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Water Sci Technol (2011) 64 (5): 1064–1072.
Article history
Received:
November 05 2010
Accepted:
January 27 2011
Citation
C. Chiemchaisri, W. Chiemchaisri, P. Nindee, C. Y. Chang, K. Yamamoto; Treatment performance and microbial characteristics in two-stage membrane bioreactor applied to partially stabilized leachate. Water Sci Technol 1 September 2011; 64 (5): 1064–1072. doi: https://doi.org/10.2166/wst.2011.534
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