Electrocoagulation - A Promising Technology for Sewage Treatment

Treatment of sewage wastewater has become an absolute necessity because sewage is main point source pollutant on global scale. An innovative, cheap and effective method of purifying and cleaning wastewater before discharging into any other water system is needed. Wide ranges of wastewater treatment techniques are known which include biological process and physicochemical process. Study has been made to replace the biological treatment of sewage by electrochemical process with consideration to achieve desired water quality. Present study was conducted to investigate the applicability of the electro-coagulation technique for the treatment of sewage wastewater. In this study lab-scale electro-coagulation was carried out for the treatment of raw sewage wastewater at different operating time i.e 15min, 20min, 25min, 30min using Aluminum as Cathode and Mild steel as a Anode, with 15mm and 10 mm electrode spacing, supplying 24v and 10amp. It is observed that the batch which is operated at 10Amp for 30 min has maximum removal efficiency of COD & S.S i.e. 95% & 86% respectively at optimum pH 8.3.