There are many types of coking wastewater, from the source of waste water produced, to the water that coking coal brings in, to the conversion of the coking product, to the use of direct steam, to the conversion of water, process media, washing salt, etc. Chemicals brought into the water, process piping equipment, such as cleaning the added water, cleaning oil tanker trucks and other water. Divided from its discharge method, there are residual ammonia water separated from the condensate of coke oven gas, separated water of the process media during the recovery and refining of coking products, and other sewage, which are difficult to treat industrial wastewater. At present, the domestic technology for the treatment of coking wastewater mainly adopts biochemical methods. The biochemical method has a good removal effect on phenols and benzenes in wastewater, but the quinolines, quinones, pyridines, carbazoles, etc. Poorly biodegradable organics have poor treatment