On the Best Condition of Electrolysis Coking Wastewater by Orthogonal Method.

Coking wastewater was advanced treated by electrolytic experiment. Through the orthogonal method, we found out the optimum experimental condition as current density 20 mA/cm2, electrode plate span 1cm, electrolytic time 60 min, PH 7 and electrical conductivity 8000 mu s/cm. The removal rates of COD, NH3-N and phenol were 58.62%, 89.9% and 96.8% respectively and the corresponding concentrations were 97.78mg/L, 14.3mg/L and 0.43mg/L respectively, which can meet first discharge standard of GB 13456-1992.