Application of swirling bed electrochemical process in industrial wastewater treatment

Abstract

Based on the self-made electrochemical device, by measuring the hardness removal rate, bicarbonate removal rate, energy consumption, pH value, etc., during the device operation, the effect of three electrochemical devices on the treatment of actual industrial wastewater, including no filling, filling swirl sheet, filling swirl sheet and mixed resin, was systematically studied. The results show that the removal efficiency of hardness and bicarbonate of industrial wastewater is the best when the swirl metal sheet was added into the electrochemical device. After 5 h, the removal rate of hardness and bicarbonate of cathode and anode was 38.6 and 21.8%, respectively, and the removal rate of bicarbonate of cathode and anode was 62.4 and 100%, respectively. The maximum difference of pH value of anode and cathode effluent just demonstrated that the electrolysis effect was the best. The structure of this device was very conducive to the application in industrial wastewater. In addition, the influence of operational voltage on the electrochemical device filled with swirl sheet was appropriately discussed from the perspective of hardness, current and electric power of the effluent. The analysis results show that 10 V was the best operational voltage. At this time, the current density was 8.11 A/m2, and the hardness removal rate was 89.4%. This study could expand the practical application of electrochemical technology in industrial wastewater treatment and adds some meaningful basic theoretical data.