Title: Application of biofilm membrane bioreactor and Reverse Osmosis membrane to the treatment of fresh and partially stabilised leachate

Authors: Chart Chiemchaisri, Sujirut Putthiwara, Adisorn Chanpeng

Addresses: Department of Environmental Engineering/National Center of Excellence for Environmental and Hazardous Waste Management, Faculty of Engineering, Kasetsart University, 50 Phaholyothin Road, Chatuchak, Bangkok 10900, Thailand. ' Faculty of Engineering, Department of Environmental Engineering, Kasetsart University, 50 Phaholyothin Road, Chatuchak, Bangkok 10900, Thailand. ' Faculty of Engineering, Department of Environmental Engineering, Kasetsart University, 50 Phaholyothin Road, Chatuchak, Bangkok 10900, Thailand

Abstract: Membrane Bioreactor (MBR) with sponge cube media and reverse osmosis (RO) were investigated in laboratory scale. Fresh and partially stabilised leachate contained COD/N of 30 and 10 and BOD/COD of 0.7-0.9 and 0.4-0.7, respectively. Continuous and intermittent aeration modes were examined. COD and TKN removals were more than 90%. Highest nitrogen removal efficiency was achieved when aeration of 1 h on and 2 h off cycle were employed. The effluent from MBR was further treated in RO unit with average rejection efficiencies of 75% 97%, 94% and 99% for COD, NH4+, SO42− and PO43−, respectively.

Keywords: biofilm reactors; floating media; leachate treatment; membrane bioreactors; microfiltration; reverse osmosis; effluent treatment; nitrogen removal efficiency; aeration.

DOI: 10.1504/IJEE.2011.041349

International Journal of Environmental Engineering, 2011 Vol.3 No.3/4, pp.210 - 220

Published online: 20 Jul 2011 *

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