Title: Application of combined filtration and coagulation for semi-aerobic leachate treatment

Authors: Zawawi Daud, Hamidi Abdul Aziz, Mohd. Nordin Adlan, Yung-Tse Hung

Addresses: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' Department of Civil and Environmental Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, OH 44115, USA

Abstract: The landfill leachate was taken from the Pulau Burung Landfill Site (PBLS), Malaysia. Filtration by limestone-zeolite (15 : 25) and limestone-GAC (15 : 25) with filtration rate = 0.01 m³/m².minute showed that 70% and 85% of colour and 42% and 70% COD were removed, respectively. Maximum colour removal (93% and 92%) and COD removal (56% and 46%) were achieved by the addition of 2000 mg/L PAC and 9000 mg/L alum respectively. Filtration by limestone-zeolite (15 : 25) and limestone-GAC (15 : 25) followed by coagulation at optimum dosage of 800 mg/L PAC, was efficient to reduce colour (98% and 99%) and COD (70% and 86%) respectively.

Keywords: leachate treatment; landfill leachate; limestone; zeolite; GAC; granular activated carbon; filtration; coagulation; PAC; polyaluminium chloride; aluminium sulphate; Malaysia.

DOI: 10.1504/IJEWM.2009.027409

International Journal of Environment and Waste Management, 2009 Vol.4 No.3/4, pp.457 - 469

Published online: 22 Jul 2009 *

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