Electrocoagulation treatment of automobile wastewater: optimization by RSM

In this study automobile, wastewater treatment was carried out using the batch mode electrocoagulation process. The Electrocoagulation process was optimized using response surface methodology. The central composite design was applied on four variable parameters were selected pH, electrolysis time (ET), the distance between electrodes (DE), and current (C) over depended response variable COD. The experiment was conducted as per the experimental run generated by the software. At optimum condition pH=5.84, ET=71.40 min, DE=0.62 cm and C=3.50 A COD removal was 91.53%. Applied model design is shown significance in terms of p-value less than 0.05 with a higher F value. ANOVA results show adequacy between predicted and observed experimental data. The correlation coefficient between predicted data and observed data was more than 0.90.