Degradation of Inorganic Nitrogen in Beiyun River of Beijing, China

Nitrogen pollution characteristics of Beiyun River and the migration of inorganic nitrogen in sediment-water were studied using laboratory experiment. Extract NH4-N was the dominant pollutants in Beiyun River that caused the severe harm to aquatic system. NH4-N exchange in sediment-water system was observable at different sites. The calculating of NH4-N degradation coefficients showed there was little difference of NH4-N degradation rate at three sites of Beiyun River. Nitrification process was mainly occurred in 12 days and NH4-N can rapidly in the degradation without input.