Abstract: Modern coal chemical industry is a high water-consuming industry and produces a large amount of wastewater. IMC is a multi-stage short-range nitrification and denitrification process technology characterized by strong shock resistance, high degree of automation and low operating costs, which is suitable for treating coal chemical wastewater. Based on the process characteristics and optimized design of IMC, the removal rates of COD, BOD, ammonia nitrogen and total nitrogen by IMC process in practical application in the coal chemical wastewater treatment of certain project in Shaanxi were greater than 95%, 97%, 99% and 96% respectively. This can ensure that the coal chemical wastewater effluent meets the discharge standards. The treated products are CO2 and N2 and no secondary pollution is generated. 

Key words:  , coal chemical wastewater, wastewater treatment, IMC process, short-range nitrification and denitrification