School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
J Environ Sci (China). 2009;21(10):1336-41. doi: 10.1016/s1001-0742(08)62423-7.
Bacterium Providencia rettgeri YL was found to exhibit an unusual ability to heterotrophically nitrify and aerobically denitrify various concentrations of ammonium (NH4+-N). In order to further understand its removal ability, several experiments were conducted to identify the growth and ammonium removal response at different carbon to nitrogen (C/N) mass ratios, shaking speeds, temperatures, ammonium concentrations and to qualitatively verify the production of nitrogen gas using gas chromatography techniques. Results showed that under optimum conditions (C/N 10, 30 degrees C, 120 r/min), YL can significantly remove low and high concentrations of ammonium within 12 to 48 h of growth, respectively. The nitrification products hydroxylamine (NH2OH), nitrite (NO2(-)) and nitrate (NO3(-)) as well as the denitrification product, nitrogen gas (N2), were detected under completely aerobic conditions.
肠杆菌属雷特氏菌 YL 被发现具有异养硝化和好氧反硝化各种浓度的铵（NH4+-N）的不寻常能力。为了进一步了解其去除能力，进行了几项实验，以确定在不同的碳氮（C/N）质量比、摇床速度、温度、铵浓度下的生长和铵去除响应，并使用气相色谱技术定性验证氮气的产生。结果表明，在最佳条件（C/N 为 10，30°C，120r/min）下，YL 可以在 12 到 48 小时的生长时间内分别显著去除低浓度和高浓度的铵。在完全好氧条件下检测到硝化产物羟胺（NH2OH）、亚硝酸盐（NO2(-)）和硝酸盐（NO3(-)）以及反硝化产物氮气（N2）。
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