Using of Electro-Fenton Process as the Olefin Wastewater Pretreatment and Analysis by Taguchi Statistics Method

Nowadays, due to the environmental challenges of industrial wastewater containing toxic and dangerous substances, there is particular importance in needing new and effective technologies for wastewater treatment. Electrochemical methods as one of the advanced oxidation processes used effectively for the decomposition of organic compounds. The Electro-Fenton process is one of these processes that it generates hydroxyl radicals. During electrochemical reactions and by applying electricity to the anode and cathode electrodes, hydroxyl radicals attack the pollutants and remove them. The purpose of this study is to evaluate the performance of the electro-Fenton process as an industrial wastewater pretreatment with a high concentration of olefin materials. In this study, an electro-Fenton batch reactor equipped with two iron electrodes and DCpower supply was used in the lab scale for the removing resistant and organic compounds. Effects of four operational parameters such as pH, concentration of H2O2 (hydrogen peroxide), reaction time and concentration of divalent iron were evaluated at the 5 levels and finally the optimum conditions of any factor was obtained by using of Taguchi statistics method in from of H2O2 160 mM (Level 4), pH factor 3 (Level 1), concentration of iron 40 mg l-1 (Level 5) and time of 15 min (Level 1), respectively. Also, the first and second order synthetic models were fitted to the experimental data. Results indicated that the second order of synthetic models has the best agreement with the experimental values.