REMOVAL OF RESIDUAL ORGANICS IN COKING WASTE-WATER UNDER DIFFERENT ELECTROLYTIC CONDITIONS USING THREE-DIMENSIONAL SYSTEM

摘要

Chemical oxygen demand (COD) removal was tested to document the feasibility of saturated coke as one polar in three-dimensional electrode system. The experiments also showed that the three-dimensional electrode system can effectively remove the residual biorefractory COD in biologically pretreated coking wastewater. At pH of 5.4, coke size of 10-20 mesh, dosing quantity of 200ml, current density of 8.88 mA/cm~2, and electrode distance of 1.0cm, approximately 70% of the residual organics in the three-dimensional electrode system were removed in 50 minutes. The kinetics for COD removal was presented. In addition, the surface characteristics of coke changed remarkably after experiments.