Electrocoagulation process for oily wastewater treatment and optimization using response surface methodology

Abstract Electrocoagulation technique using aluminum electrodes in a batch bi-polar system was investigated to determine the efficiency of removing oil from oily wastewater. The Box–Behnken design utilized optimize conditions and effects four independent factors, including volume ( X 1 ), temperature 2 initial pH 3 treatment time 4 ),—were examined investigate turbidity recovery conductivity changes. significant variables their interactions were assessed ANOVA. optimal operating for removal obtained at an 10 ml L −1 , 28 °C, 4, coagulation 90 min. results revealed that changes are enhanced significantly with increasing decreasing volume. application process under allows promising efficiencies 97.3%, 73.4% conductivity, respectively. Also treated wastewater showed remarkable main pollution loads COD, NO PO DO, BOD. economic study indicated by electrocoagulation is very cost-effective technique.