title: Impact resistance of different factors on ammonia removal by heterotrophic nitrification-aerobic denitrification bacterium Aeromonas sp. HN-02.
abstract: To give reference for the application of heterotrophic nitrification-aerobic denitrification bacteria in actual wastewater treatment, the impact resistance of extreme pH, low temperature, heavy metals and high salinity on ammonia removal by a typical heterotrophic nitrifying-aerobic denitrifying bacterium Aeromonas sp. HN-02 was investigated. The results showed that HN-02 demonstrated strong acid- and alkali-resistance. In addition, it remained active at 5°C, and the removal rates of ammonia and COD were 0.90 mg L(-1)h(-1) and 22.34 mg L(-1)h(-1), respectively. Under the same extent of immediate temperature drop, the temperature correction coefficients of ammonia, COD removal rates and cell growth rate were close. Moreover, HN-02 could survive in the solution containing 0.5 mg L(-1) Cu(2+) or 8 mg L(-1) Zn(2+), or 0.5 mg L(-1) of equivalent Cu(2+)-Zn(2+). Furthermore, efficient ammonia removal was retained at salinity below 20 g L(-1), thus it could be identified as a halotolerant bacterium. At last, stronger stress resulted in higher ΔCOD/ΔTN ratio.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Maoxia
authors.initials: M
authors.lastname: Chen
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Wenchao
authors.initials: W
authors.lastname: Wang
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Houzhen
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China. Electronic address: tanzhl@cib.ac.cn.
authors.forename: Zhouliang
authors.initials: Z
authors.lastname: Tan
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Li
mesh_terms: D000332:Aerobiosis / Q000187:drug effects; D000333:Aeromonas / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D000641:Ammonia / Q000302:isolation & purification*; D001673:Biodegradation, Environmental / Q000187:drug effects; D057919:Biological Oxygen Demand Analysis; D002244:Carbon / Q000378:metabolism; D058440:Denitrification / Q000187:drug effects; D052836:Heterotrophic Processes / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000302:isolation & purification; D058465:Nitrification / Q000187:drug effects; D009584:Nitrogen / Q000494:pharmacology; D054712:Salinity; D013696:Temperature
chemical_list: D019216:Metals, Heavy; D002244:Carbon; D000641:Ammonia; D009584:Nitrogen
keywords: Heavy metals; Heterotrophic nitrification–aerobic denitrification; High salinity; Impact resistance; Low temperature