The use of Polyaluminum Chloride for the treatment of Landfill Leachate via Coagulation and Flocculation processes

摘要

Leachate is a highly complex and polluted wastewater that is produced by the interaction of percolating water through the body of a landfill. Treatment of landfill leachate is essential as it could threaten the surrounding ecosystem. The aim of this research was to determine the efficiency of polyaluminum chloride (PACl) in removing chemical oxygen demand (COD), ammoniacal nitrogen (NH-N) and color from two different landfill sites in Malaysia. The optimum dosage in removal of these parameters was determined and found to be lower for Kulim Landfill Site (KLS) than Ampang Jajar Landfill Site (AJLS). At optimum dosage of PACl as coagulant, the COD removal for KLS was higher than that obtained for AJLS. The removal of color for both sites was almost similar. The removal NH-N was rather moderate for both the landfill sites with KLS exhibiting relatively higher removal rates.