Journal of East China Normal University(Natural Sc ›› 2018, Vol. 2018 ›› Issue (6): 1-11,67.doi: 10.3969/j.issn.1000-5641.2018.06.001

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Aerobic denitrifiers and the state of research in their use for sewage treatment and environmental remediation

DING Yu1,2, ZHANG Ting-yue1,2, HUANG Min-sheng1,2, HE Yan1,2, CAO Cheng-jin1,2   

  1. 1. School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China;
    2. Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China
  • Received:2018-06-01 Online:2018-11-25 Published:2018-12-01

Abstract: The use of aerobic denitrifying bacteria has introduced a new concept to traditional biological nitrogen removal given its unique advantages for simultaneous nitrification and denitrification. This paper reviewed the separation methods of aerobic denitrifiers as well as their respective types and influencing factors. The mechanism of aerobic denitrification is explored from the perspective of electron transfer bottleneck theory and enzymology; meanwhile, the applications for wastewater treatment and environmental remediation are also introduced. Studies have shown that:temperature, dissolved oxygen (DO), carbon source, the carbon to nitrogen ratio, and pH value all have effects on the aerobic denitrification process; and aerobic denitrifying bacteria have efficient nitrogen removal efficiency under suitable conditions. However, at present, aerobic denitrifying bacteria still have insufficient impact for environmental remediation applications. There is a gap between laboratory results and engineering applications, so further investigation is needed. This paper systematically summarizes the separation methods, types, reaction mechanisms, influencing factors, and applications of aerobic denitrifying bacteria in wastewater treatment and environmental remediation.

Key words: aerobic denitrifier, biological denitrification, environmental bioremediation

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