International Journal of Earth Sciences and Engineering

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The leachate is a highly contaminant water hence it needs to be treated. The main aims of this research were to determine the Chemical oxygen demand (COD) concentration and heavy metals (zinc, chromium, lead, cadmium and nickel) in leachate in landfill area. The pollutants were analyzed using coagulation and flocculation process. The coagulants used were the aluminum sulphate (alum) and ferric chloride. The jar test apparatus were employed for the removal of pollutants. The experiments were carried out by varying the dosage of coagulants. The optimum pH level and the dosage level are also found as 8.5 and 3 g/l for ferric chloride and for alum 10.5 and 1.5 g/l. The alum is found to be efficient in the removal of heavy metals and ferric chloride for COD.

Keywords

Leachate, Coagulation-Flocculation, COD, Heavy Metals, Alum, Ferric Chloride.
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