Evaluation of the Efficiency of Ti/IrO2/RuO2 Anode in COD Removal from Paper Industry Wastewaters by Electrooxidation Method

Abstract

In the research, the electrooxidation method of the electrochemical treatment methods in the batch system was explored a variety of experimental conditions for the treatment of wastewater from the paper sector. 4 anodes and 4 cathodes sieve type plates with dimensions of 7 cm x 10 cm were positioned at 0,5 cm intervals in the 2000 mL volume jacketed glass reactor used for the treatment of wastewater from the paper industry, and 1200 mL wastewater was used in the testing. 4 coated Ti/IrO2/RuO2 electrodes of the sieve type were used as the anode material and 4 uncoated Ti electrodes of the sieve type were utilized as the cathode material in the electrooxidation of effluent from the paper industry. In the experiments, the removal rate of the COD (Chemical Oxygen Demand) pollutant parameter; The effects of supporting electrolyte types and concentrations such as KCl, NaCl, NaNO3, and Na2SO4, and parameters such as initial pH value and current density of wastewater without supporting electrolyte were investigated. According to the results obtained; In the experiments conducted at the natural pH value of wastewater, 18.55 mA/cm2 was the most effective current density, 0.50 M NaCl was the most effective supporting electrolyte type and concentration. The COD removal rate at the best conditions (37.11 mA/cm2 current density) was 90.62%. In optimum conditions; 73.20% COD removal efficiency has been achieved.