Abstract:
:Providencia rettgeri strain YL was found to be efficient in heterotrophic nitrogen removal under aerobic conditions. Maximum removal of NH(4) (+)-N occurred under the conditions of pH 7 and supplemented with glucose as the carbon source. Inorganic ions such as Mg(2+), Mn(2+), and Zn(2+) largely influenced the growth and nitrogen removal efficiency. A quantitative detection of nitrogen gas by gas chromatography was conducted to evaluate the nitrogen removal by strain YL. From the nitrogen balance during heterotrophic growth with 180 mg/l of NH(4) (+)-N, 44.5% of NH(4) (+)-N was in the form of N(2) and 49.7% was found in biomass, with only a trace amount of either nitrite or nitrate. The utilization of nitrite and nitrate during the ammonium removal process demonstrated that the nitrogen removal pathway by strain YL was heterotrophic nitrification-aerobic denitrification. A further enzyme assay of nitrate reductase and nitrite reductase activity under the aerobic condition confirmed this nitrogen removal pathway.
journal_name
J Ind Microbiol Biotechnoljournal_title
Journal of industrial microbiology & biotechnologyauthors
Zhao B,He YL,Huang J,Taylor S,Hughes Jdoi
10.1007/s10295-010-0708-7subject
Has Abstractpub_date
2010-06-01 00:00:00pages
609-16issue
6eissn
1367-5435issn
1476-5535journal_volume
37pub_type
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