Journal of Biology ›› 2023, Vol. 40 ›› Issue (1): 91-.doi: 10.3969/j.issn.2095-1736.2023.01.091

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Research progress on nitrogen metabolism characteristics of heterotrophic nitrification-aerobic denitrification bacteria

HUANG Shiwei1,2, TIAN Yun2, MA Shu1,2, LU Xiangyang2   

  1. 1. College of Medical Technology, Shaoyang University, Shaoyang 42200, China;
    2. College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
  • Online:2023-02-18 Published:2023-02-21

Abstract: The related reports of HN-AD bacteria in recent 40 years were reviewed. The types of HN-AD bacteria, common application and nitrogen removal effect, nitrogen metabolism pathways, key enzymes of nitrogen metabolism and common influencing factors of nitrogen metabolism process of HN-AD bacteria were expounded, in order to provide theoretical basis for mining more efficient HN-AD bacteria and applying them in practical wastewater treatment. At present, most of the application research on HN-AD bacteria were in laboratory, the research on the nitrogen removal molecular mechanism is still not enough in-depth. In the future, the role of key enzyme-coding genes in the nitrogen metabolism process of strains can be further clarified by means of gene knockout, and efficient nitrogen removal engineering bacteria can be constructed by means of gene recombination or somatic cell fusion to cope with more complex wastewater environment.

Key words: biological nitrogen removal, heterotrophic nitrification-aerobic denitrifying bacteria, nitrogen metabolism characteristics, key enzymes, influencing factors

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