Xu Yi, He Tengxia, Li Zhenlun, Ye Qing, Chen Yanli, Xie Enyu, Zhang Xue
Chongqing Key Laboratory of Soil Multiscale Interfacial Process, Southwest University, Chongqing 400716, China.
Biomed Res Int. 2017;2017:1429018. doi: 10.1155/2017/1429018. Epub 2017 Feb 15.
The cold-adapted bacterium Y-9 was investigated and exhibited excellent capability for nitrogen removal at 15°C. The strain capable of heterotrophic nitrification and aerobic denitrification could efficiently remove ammonium, nitrate, and nitrite at an average removal rate of 2.85 mg, 1.60 mg, and 1.83 mg NLh, respectively. Strain Y-9 performed nitrification in preference to denitrification when ammonium and nitrate or ammonium and nitrite coexisted in the solution. Meantime, the presence of nitrate had no effect on the ammonium removal rate of strain Y-9, and yet the presence of high concentration of nitrite would inhibit the cell growth and decrease the nitrification rate. The experimental results indicate that Y-9 has potential application for the treatment of wastewater containing high concentrations of ammonium along with its oxidation products at low temperature.
对冷适应细菌Y-9进行了研究，该细菌在15°C时表现出优异的脱氮能力。这种能够进行异养硝化和好氧反硝化的菌株能够分别以2.85mg、1.60mg和1.83mg NLh的平均去除率高效去除铵、硝酸盐和亚硝酸盐。当溶液中铵与硝酸盐或铵与亚硝酸盐共存时，菌株Y-9优先进行硝化而非反硝化。同时，硝酸盐的存在对菌株Y-9的铵去除率没有影响，但高浓度亚硝酸盐的存在会抑制细胞生长并降低硝化率。实验结果表明，Y-9在低温下处理含有高浓度铵及其氧化产物的废水方面具有潜在应用价值。
