Decolorization of Textile Wastewater by Electrochemical Process in the Presence of Hydrogen peroxide and Poly Aluminum Chloride

This study was undertaken to evaluate the effectiveness of application of H2O2 and PAC in conjunction with electrochemical process in the removal of color from real textile wastewater. The experiments of electrochemical process were performed in the lab scale using copper electrodes. The influence of applied current (100- 400mA)، pH (3-10)، dosage of H2O2 (0. 005- 0. 02 M) and dosage of PAC (50- 200 mg/L) on decolorization and mineralization were evaluated. The optimum conditions were obtained at a pH of 3، with 0. 01 M H2O2 and applied current 300mA for the electrolysis with H2O2 and pH of 7، 100 mg/L PAC and applied current 300mA for the electrolysis with PAC. The results displayed that electrochemical process in presence of H2O2 was more effective than PAC as an additive. The maximum of energy consumptions were 3. 52 and 3. 91 kWh/m3 for electrochemical process with H2O2 and PAC after 50min، respectively. Finally، it can be concluded that electrochemical process is an effective and reliable process for the removal of color and organic compounds from colored wastewater.