Research Progress of Coal Chemical Wastewater Treatment

China is a country with more coal and less oil. Therefore, the utilization rate of coal and pollution control are very important to our country. Coal chemical wastewater has the characteristics of large sewage discharge, many types of pollutants, and high concentration of pollutants, so it is extremely difficult to treat and restrict the development of China’s coal chemical industry. This article explains the source, characteristics and components of coal chemical wastewater, the whole process of pretreatment, secondary treatment and advanced treatment of coal chemical wastewater. The pretreatment includes air flotation, isolation, denitrification and dephenol; secondary treatment process A 2 O, SBR; advanced treatment methods such as coagulation, adsorption, advanced oxidation, and finally the coal chemical wastewater treatment is prospected.