In this research, electrocoagulation intensified peroxidation (ECP) using Aluminium electrode was studied as a post-treatment method for poultry slaughterhouse wastewater (SWW) with 4 operational variables (pH, current density, contact time and H2O2 dosage). Optimization was carried out using Response Surface Methodology (RSM). The experimental data were analyzed via analysis of variance and a second order model was developed to test the effects of process parameters on the treatment performance. The optimum conditions were chosen as; pH 5.83, 0.18 g/L H2O2 dosage, 58.60 min. contact time and current density 4.21 mA/cm2. The compatibility of the predicted optimum conditions has been verified by experimental data. As a result of the experiments performed under optimum conditions, COD, TSS and color removals were found to be 97.89%, 99.31% and 98.56%, respectively. The difference between experimental and predicted values ​​was found to be less than 0.86%. The final treated effluent met the discharge standards determined by the World Bank, EU, US and Malaysian Department of Environment for SWWs. Under optimum conditions to treat 1 cubic meter of SWW was calculated as 2.52 MYR ($ 0.58).