SELECTION AND CONSUMPTION OF ELECTRODE MATERIAL FOR ELECTROCOAGULATION OF LANDFILL LEACHATE

During electrochemical wastewater treatment, special attention is paid to the choice of electrode material. This paper investigated the effect of anode material on turbidity removal efficiency and total dissolved solids (TDS) removal efficiency by the electrocoagulation of landfill leachate. Iron anode achieved higher turbidity removal efficiency compared to aluminum anode at all applied current densities (j = 10; 25; 50 mA/cm(2)). Also, at low current densities TDS removal efficiency is higher for iron anode. The consumption of electrode material is calculated in accordance with the Faraday law, and is increased with increasing current density and duration of electrolysis. In order to examine the influence of cathode material, stainless steel (SS) was also used as the cathode. By using a stainless steel cathode, there was a higher removal efficiency of TDS and a higher turbidity removal, so iron cathode can be successfully replaced by cathodes of stainless steel.