Review on the Development of New Technology of Biological Nitrogen Removal from Sewage

With the improvement of water treatment technology, the biological nitrogen removal of sewage has also made a great progress. Research economic and efficient denitrification technology has become the hot issues of domestic and foreign scholars. During the long-term operation of wastewater treatment, the differences in physiological and biochemical characteristics of traditional denitrification technologies make various functional microflora interact with each other in the same system, which restricts the efficiency and stability of the process. Therefore, some new treatment technologies emerge. This review introduces the new technology and its development direction of biological nitrogen removal in recent years from two aspects: New technology of the original technology improvement and combination and new technology based on the principle of development, engineering examples in the wastewater treatment industry are enumerated.