Charcoal wastewater is produced in the quenching process of semi-coke products made from coal. Its contents of COD, BOD, SS, phenol and NH3-N are high, and its composition is complex and changeable, so it belongs to industrial wastewater which is difficult to treat. The advanced technology and equipment independently developed by our company and patented by the state have been adopted in the wastewater treatment project of blue carbon production. After wastewater treatment, the removal rate of ammonia nitrogen reached more than 90%, and the removal rate of phenol reached more than 80%, reaching the national discharge standard. The treated sewage can be reused for coke quenching. On the one hand, it saves production costs for enterprises; On the other hand, waste is turned into treasure through resource treatment, and the recovery rate of ammonia nitrogen reaches over 95%. Jiangxi mingxing environmental protection technology co., ltd