TY - JOUR ID - 706 TI - Electrocoagulation of Tannery Wastewater using Monopolar Electrodes: Process Optimization by Response Surface Methodology JO - International Journal of Environmental Research JA - IJER LA - en SN - 1735-6865 AU - Varank, G. AU - Erkan, H. AU - Yazýcý, S. AU - Demir, A. AU - Engin, G. AD - Department of Environmental Engineering, Yýldýz Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey Y1 - 2014 PY - 2014 VL - 8 IS - 1 SP - 165 EP - 180 KW - Tannery wastewater KW - Electrocoagulation KW - RSM KW - Optimization KW - Cost analysis DO - 10.22059/ijer.2014.706 N2 - In the present study, the treatment of tannery wastewater was performed by electrocoagulationmethod (EC) using aluminium and steel electrodes. Response surface methodology (RSM) with three factors; current density (I), electrolysis time (t) and pH, with each factor at five levels, was used to optimize the factors for higher chemical oxygen demand (COD) and total suspended solids (TSS) removal. Operational parameters I, t and pH were varied between 22–110 mA/cm2, 5-45 min and 3-7, respectively. For the optimal parameter values, the removal efficiency of COD and TSS attained respectively 82.2% and 85.5% for aluminium electrodes and 67.4% and 86.2% for steel electrodes. Analysis of variance (ANOVA) showed a high variance coefficient (R2) value of 0.96 and 0.81, for COD and TSS removal, respectively, thus ensuring a satisfactory adjustment of the second-order regression model with the experimental data. Corresponding energy consumption was found to be 2.92 €/m3 and 8.18 €/m3, for COD removal by using aluminium and steel electrodes, respectively. UR - https://ijer.ut.ac.ir/article_706.html L1 - https://ijer.ut.ac.ir/article_706_6acc1c4e38835a864b221e23fbd723b5.pdf ER -