Screening and Identification of an Aerobic Denitrifying Bacterium with Low C/N Ratio at Low Temperature

  • ZHOU Lanying ,
  • MA Xiulan ,
  • ZHANG Chendong ,
  • WANG Chengyu ,
  • ZHANG Fengjun
  • 1. Key Laborotary of Groundwater Resources and Environment of Ministry of Education, Jilin University, Changchun 130021, China;
    2. Institute of Superuision Inspection on Product Quality of Jilin Province, Changchun 130022, China;
    3. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China

Received date: 2013-11-15

  Revised date: 2014-02-25

  Online published: 2014-04-26


The conventional denitrification process has limited applications due to its disadvantages, such as long generation time of denitrifying bacteria, especially in cold winter, long hydraulic retention time and high costs. In this study, an aerobic denitrifying bacterium designated as HFX08 was isolated from a domestic sewage plant in a northern city of China in winter. The strain HFX08 exhibited high denitrification performance under low C/N ratio at low temperature. The results indicated that the strain HFX08 was G- and identified as Pseudomonas sp. The optimum temperature for its growth is in the range of 10-20℃. Its growth curve was fitted to S growth curve, whose fitting coefficient reached the level of extremely significant difference. The nitrogen removal rate by strain HFX08 increased with increasing C/N ratio, up to 92%.

Cite this article

ZHOU Lanying , MA Xiulan , ZHANG Chendong , WANG Chengyu , ZHANG Fengjun . Screening and Identification of an Aerobic Denitrifying Bacterium with Low C/N Ratio at Low Temperature[J]. Science & Technology Review, 2014 , 32(11) : 33 -37 . DOI: 10.3981/j.issn.1000-7857.2014.11.004


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