Status and development trends of new biological nitrogen removal technologies for wastewater treatment

Several novel biological nitrogen removal technologies,for instance shortcut nitrification-denitrification and si- multaneous nitrification-denitrification and anaerobic ammonium oxidation.were reviewed.The characteristics of these new tech- nologies and their shortcomings were introduced.And the research work in China was introduced.Various methods in connection with the shortcut nitrification-denitrification,such as temperature controlling,dissolved oxygen concentration and pH value,were emphatically discussed.At the same time prospects were made for the development trends and the application foreground of shortcut nitrification-denitrification achieved using sequencing batch reactor.It was suggested that the research on reaction mech- anisms of simultaneous nitrification-denitrification and anaerobic ammonium oxidation should be strengthened.