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Bioresour Technol. 2014 Sep;167:456-61. doi: 10.1016/j.biortech.2014.06.001. Epub 2014 Jun 19.

Impact resistance of different factors on ammonia removal by heterotrophic nitrification-aerobic denitrification bacterium Aeromonas sp. HN-02.

Author information

1
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.
2
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.

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.

KEYWORDS:

Heavy metals; Heterotrophic nitrification–aerobic denitrification; High salinity; Impact resistance; Low temperature

PMID:
25006021
DOI:
10.1016/j.biortech.2014.06.001
[Indexed for MEDLINE]

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