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Volume 161, Issue 4

Heterotrophic nitrification and aerobic denitrification at low nutrient conditions by a newly isolated bacterium, sp. SYF26 Free

Abstract

A new strain, named SYF26, was isolated from the Hei He oligotrophic drinking-water reservoir in China. Based on its phenotypic and phylogenetic characteristics, the isolate was identified as a species of genus . Strain SYF26 was able to grow at low NH -N concentrations (5.46 mg l), and the nitrification rate was 0.064 mg NH -N l h. Low accumulation of nitrate and nitrite was observed throughout the ammonium removal experiment. Strain SYF26 reduced NO -N or NO -N. Nitrite reductase and periplasmic nitrate reductase were detectable. The putative nitrogen removal process carried out by the strain SYF26 is as follows: NH →NHOH→NO →NO , then NO →NO →N. Response surface methodology analysis demonstrated that the maximum removal of ammonium occurred under the following conditions: NH -N concentration of 22.05 mg l, C/N ratio of 4.31, initial pH of 7.78 and temperature of 29.73 °C, where initial pH and temperature had the largest influence on ammonium removal.

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© 2015 The Authors
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2015-04-01
2024-04-19
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Heterotrophic nitrification and aerobic denitrification at low nutrient conditions by a newly isolated bacterium, Acinetobacter sp. SYF26
Microbiology 161, 829 (2015); https://doi.org/10.1099/mic.0.000047
/content/journal/micro/10.1099/mic.0.000047
/content/journal/micro/10.1099/mic.0.000047
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