[Research advances in aerobic denitrifiers].
This paper reviewed the varieties and characteristics of aerobic denitrifiers, their action mechanisms, and the factors affecting aerobic denitrification. Aerobic denitrifiers mainly include Pseudomonas, Alcaligenes, Paracoccus and Bacillus, which are either aerobic or facultative aerobic, and heterotrophic. They can denitrify under aerobic conditions, with the main product being N2O. They can also convert NH4+ -N to gas product. The nitrate reductase which catalyzes the denitrification is periplasmic nitrate reductase rather than membrane-bound nitrate reductase. Dissolved oxygen concentration and C/N ratio are the main factors affecting aerobic denitrification. The main methods for screening aerobic denitrifiers, such as intermittent aeration and selected culture, were also introduced. The research advances in the application of aerobic denitrifiers in aquaculture, waste water processing, and bio-degradation of organic pollutants, as well as the contributions of aerobic denitrifiers to soil nitrogen emission were summarized.
Wang
Wei
W
College of Life Science, Nanjing Normal University, Nanjing 210097, China. xiaojuhao_2001@163.com
Cai
Zu-cong
ZC
Zhong
Wen-hui
WH
Wang
Guo-xiang
GX
D000332:Aerobiosis; D000421:Alcaligenes / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D050901:Nitrate Reductase / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism*; D009609:Nitrous Oxide / Q000378:metabolism*; D010230:Paracoccus / Q000378:metabolism; D011549:Pseudomonas / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D014874:Water Pollutants, Chemical; D050901:Nitrate Reductase; D009609:Nitrous Oxide; D009584:Nitrogen