Author/Authors :
Varank، g نويسنده Department of Environmental Engineering, Y?ld?z Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey , , Erkan، h نويسنده Department of Environmental Engineering, Y?ld?z Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey , , Yaz?c?، s نويسنده Department of Environmental Engineering, Y?ld?z Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey , , Demir، a نويسنده Department of Environmental Engineering, Y?ld?z Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey , , Engin، g نويسنده Department of Environmental Engineering, Y?ld?z Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey ,
Abstract :
In the present study, the treatment of tannery wastewater was performed by electrocoagulation
method (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
