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Treatment of Sullage Wastewater by Electrocoagulation using Stainless Steel Electrodes

P. Santhosh, D. Revathi and K. Saravanan

The study was made for the treatment of sullage wastewater using electrocoagulation technique with stainless steel electrode as sacrificial anode in bipolar connection system. The effects of operating parameters such as pH, voltage and electrolysis time on the removal of COD, BOD and SS were investigated. The optimum value for each operating parameter was experimentally determined. The optimum values of voltage, initial pH and electrolysis time were found to be 8V, 6.8 and 30 mins, respectively. The experiments revealed that COD, BOD and SS in aqueous phase were effectively removed. The analysis of the treated water showed that the maximum COD, BOD and SS removal efficiencies were 92.71%, 88.76% and 93.1%, respectively at optimum conditions. The wastewater was very clear and its quality meets the discharge standard. Consequently, the electrocoagulation process can be considered as a reliable, safe and cost effective method for the treatment of sullage wastewater.