COD REMOVAL FROM MUNICIPAL WASTEWATER USING ELECTROCOAGULATION BY DIFFERENT AL/FE ELECTRODESb

In the present study different combinations of Al and Fe electrodes are used for improving the treatment efficiency in the electrocoagulation (EC) process to purify the domestic wastewater. Various factors are to be studied for the assessment of the COD removal efficiency in the form of pH (3–9), time (10–60 min), and density of current (9.0–40 A/m2). Depending on the influencing factor Al–Al and Fe–Fe able to minimize COD percentage up to 85.0 % and 90% respectively. Similarly 86.0 % and 87.50 % of COD were removed, when aluminium and iron were combined as Al–Fe and Fe–Al respectively. Further, the operating parameters were investigated on the removal of COD. The present study reported that, the combination of electrodes affects greatly on the efficiency of percentage removal of COD using the EC technique.