The New Technology of Biological Nitrogen Removal from Wastewater and Problem Analysis

The progresses of biological nitrogen removal,such as the investigation on shortcut nitrification-denitrification,simultaneous nitrification-denitrification(SND),anaerobic ammonium oxidation as well as others,are simply reviewed and discussed in this paper.The possible mechanisms of reaction and the recently feasible treatment processes are briefly introduced.The advantages of these new technologies in the field are compared with the traditional nitrification and denitrification technoligy,and the new technologies promising for further investigation and applications are also indicated.