Research progress in nitrogen removal by aerobic denitrification

Abstract:

Aerobic denitrification technology has been widely studied since it was proposed by virtue of many advantages, such as capable of achieving simultaneous nitrification and denitrification, saving investment and operation cost. Here, we summarize the screening and isolation of aerobic denitrifying bacteria in recent years, and the influence of environmental factors on denitrifying efficiency of aerobic denitrifying bacteria, including dissolved oxygen (DO), C/N and temperature. Then, we discuss the theory of aerobic denitrification biological nitrogen removal technology and the key functional genes and enzymes of aerobic denitrification. Meanwhile, the application of molecular biotechnology in the study of aerobic denitrification and the research status on the practical application of aerobic denitrification are reviewed.