Abstract: Industrial waste which exceeds the national emission standard for the discharge of pollutants was a major cause of receiving waters pollution. The application of microwave(MW) and activated carbon (GAC) in the treatment of ammonia nitrogen (NH³-N) and Chemical Oxygen Demand(COD) in coking wastewater was explored in this study. It was shown that when GAC dosage increased, the removal rate of COD raised while the removal of NH³-N reduced. Removal of ammonia and COD in wastewater increased with the rise of MW power and radiation time. The removal rate of NH³-N and COD reached 85.3% and 60.3% respectively when the continuous flow microwave system was used to treat the coking wastewater. This study provided an alternative process for the treatment of coking wastewater.

Key words: microwave, ammonia nitrogen, COD, water treatment