shows the reduction of COD and color of wastewater with different initial pH’s. As seen from Fig. 6(a) an initial pH of 3 has the best performance for the first 10 min. After this time, the removal efficiencies did not differ significantly from each other,and there was little difference in the performance of the system with a change of initial pH. This may result from the change of pH during electrocoagulation because of the production of OH- ions at the cathode;a sharp pH increase occurs in a very short period when the initial pH is low. The adjustment of pH to 3 increased the yield of the system by approximately 4%. The removal efficiencies of 94.60%, 92.87% and 90.84%, corresponding to 105,139 and 179 mg/L, were obtained at pH values of 3, 5 and 9 respectively after 90 min electrocoagulation. As a result, direct discharge effluent was obtained at all pH values once again. This result points out that the initial pH of wastewater does not have any significant influence on the removal of COD. Therefore, further experiments were conducted at the original pH of the wastewater to prevent chemicals being wasted in regard to economic and environmental considerations. The removal of color from wastewater can be seen in Fig. 6(b). As previously observed, the removal of color almost ends after 10 min of electrocoagulation.