Treatment method of coking waste water

The invention discloses a treatment method of coking waste water, which comprises a biochemical treatment process of the coking waste water and an advanced treatment process of the coking waste water, wherein the biochemical treatment of the coking waste water adopts an A2O process; and the advanced treatment of the coking waste water adopts a method of internal electrolysis, Fenton oxidation coagulative precipitation and active carbon adsorption. In the method, an anaerobic pool, an anoxic pool and an aerobic pool are used for biochemical treatment; and internal electrolysis, Fenton oxidation coagulative precipitation and active carbon adsorption are used as an advanced section for treating the coking waste water. After the high-concentration coking waste water is treated by the method, the water quality of the effluent water can meet the sewage comprehensive discharge standard requirement that the COD (chemical oxygen demand) is no more than 50 mg/L, the ammonia nitrogen content is no more than 8 mg/L, the volatile phenol content is no more than 0.3 mg/L and the total cyanogen content is no more than 0.2 mg/L. Thus, the invention can protect the ecological environment, and has an important practical meaning for the sustainable development of coking enterprises.