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Hao QIU, Min LIAO, Xiaomei XIE, Xinyue LU, Feng YUAN, Zhe LUO, Chunlin FAN. A novel bacterial strain for the removal of ammonia nitrogen from wastewater: Pseudomonas oleovorans QS-7[J]. Journal of Zhejiang University Science B, 1998, -1(-1): .
@article{title="A novel bacterial strain for the removal of ammonia nitrogen from wastewater: Pseudomonas oleovorans QS-7",
author="Hao QIU, Min LIAO, Xiaomei XIE, Xinyue LU, Feng YUAN, Zhe LUO, Chunlin FAN",
journal="Journal of Zhejiang University Science B",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B2400257"
}
%0 Journal Article
%T A novel bacterial strain for the removal of ammonia nitrogen from wastewater: Pseudomonas oleovorans QS-7
%A Hao QIU
%A Min LIAO
%A Xiaomei XIE
%A Xinyue LU
%A Feng YUAN
%A Zhe LUO
%A Chunlin FAN
%J Journal of Zhejiang University SCIENCE B
%V -1
%N -1
%P
%@ 1673-1581
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B2400257
TY - JOUR
T1 - A novel bacterial strain for the removal of ammonia nitrogen from wastewater: Pseudomonas oleovorans QS-7
A1 - Hao QIU
A1 - Min LIAO
A1 - Xiaomei XIE
A1 - Xinyue LU
A1 - Feng YUAN
A1 - Zhe LUO
A1 - Chunlin FAN
J0 - Journal of Zhejiang University Science B
VL - -1
IS - -1
SP -
EP -
%@ 1673-1581
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B2400257
Abstract: Excessive ammonia nitrogen has been demonstrated to cause a serious hazard to water environments. Bacteria performing nitrification and denitrification (SND) simultaneously can be effective biological instruments to remove ammonia nitrogen completely from effluents. For the first time, Pseudomonas oleovorans QS-7 with SND function, isolated from the biogas treatment system of a pig farm, was found to efficiently remove ammonia nitrogen. Through the determination of key enzymes and functional genes related to the nitrogen metabolism of strain QS-7, combined with nitrogen balance measurements of the nitrogen metabolic process, it was speculated that the SND pathway of the novel strain is NH4+→NH2OH→NO2-→NO3-→NO2-→NO→N2O→N2. QS-7 exhibited 98.6% ammonia nitrogen removal and a maximum ammonia degradation rate of 9.2 mg/(L∙h) at 18 h in 100 mg/L ammonia nitrogen solution. This strain also has a certain capacity to remove nitrate and nitrite nitrogen; the maximum removal efficiencies were 54.22% and 73.93%, respectively, in systems with 100 mg/L of nitrate or nitrite nitrogen as the sole nitrogen source. Nitrogen metabolic balance analysis for QS-7, using ammonia (100 mg/L) as the sole nitrogen source, demonstrated that assimilation (56.1%) is the main mode of nitrogen removal, followed by conversion to N2 (43.6%). Meanwhile, the presence of NO2- was not detected eventually and almost no NOx was produced, which indicates that the nitrogen removal process of QS-7 is an environmentally friendly one. The optimal environmental conditions for QS-7 were found to be sodium citrate as carbon source, C/N=10, pH=7.0, 150 r/min, and 30 °C. The above results indicate that QS-7 may provide a material and conceptual basis for the advancement of SND technology.
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