Abstract
This study investigated the efficiency of electrocoagulation in removing ammonia nitrogen (NH3-N) and chemical oxygen demand (COD) from leachate. The paper studies the factors affecting the efficiency of removing NH3-N and COD of leachate, such as electrode material,current density, electrolysis time, Cl− concentration and pH of solution. Treatment was carried out in a discontinuous system,and the results show that the electrocoagulation can be applied to leachate pre-treatment. The operating conditions were current density of 4.96 mA/cm2, the raw pH, Cl− concentration of 2319 mg/L, operating time of 90 min with Fe electrode, the highest COD and NH3-N removal efficiencies were 49.8% and 38.6%, respectively.
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