Wastewater Treatment using Electrocoagulation Technique

摘要

Main objectives of the present paper to evaluate the removal of COD, TSS, TDS and oil and grease from the dairy industry wastewater by Electrocoagulation using iron as Monopolar configuration at different voltages and electrolysis time. The increase in voltage and electrolysis time increases the removal efficiency. For the removal of COD, TSS, TDS the optimum voltage and electrolysis time was 30V and 90 minutes for iron electrode. The percentage removal efficiency of 80.4%, 85.1%, 83.4% and obtained for the 30V. For oil and grease the removal efficiency of 91.4% was achieved at an optimum voltage and contact time of 30 V and 30 min. At the pH range of 4 to 7 the optimum removal efficiency of 86.5% of COD, 88% of TSS, 90.2 % of TDS and 94.5% of oil and grease was achieved with iron electrode. The removal efficiency decreases with increase in electrode spacing.