Study Of Treatment Of Coking Wastewater By Technology Of Electrochemical Oxdiation

High activity, stability, efficient electrodes was prepared by foundation electrodes screening, surface pretreatment, rare-earth metal addition and oxygen evolution materialscoating for the electrochemical oxidation of coking wastewater using three-dimensional electrode system. In order to optimize the electrochemical performance of the three-dimensional electrode process, the electrolysis tests of the coking wastewater using Ti/RuO2-IrO2anodes and the coke with or without modified were carried out, which included the optimizing of the structural and operating parameters. And the mechanism of COD and NH4+-N degradation was also studied. On that basis, the effect of supported components on COD and NH4+-N removal was investigated to optimize the electrochemical treatment of coking wastewater using three-dimensional electrode process combined with modified coke. Studies have demonstrated that the particle electrode with supported components improved the electrolysis efficiency, which could generate additional free hydroxyl radicals and greatly improve the removal rate. In addition,The results showed that the coke modified with Fe(NO3)2has the lowest energy consumption and higher COD removal rate on the same condition, and the modified coke have good surface characteristics for the purpose of this study. In addition, the kinetic constant was also calculated. Results showed that the three-dimensional electrode system with Fe (N03)2-modified coke gave a satisfied solution in biologically pretreated coking wastewater.