Huang Xiao, Bai Jie, Li Kui-Ran, Zhao Yang-Guo, Tian Wei-Jun, Dang Jia-Jia
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Mar Pollut Bull. 2017 Jan 15;114(1):192-200. doi: 10.1016/j.marpolbul.2016.08.077. Epub 2016 Sep 9.
To achieve a better contaminant removal efficiency in a low-temperature and high-salt environment, two novel strains of cold- and salt-tolerant ammonia-oxidizing bacteria (AOB), i.e., Ochrobactrum sp. (HXN-1) and Aquamicrobium sp. (HXN-2), were isolated from the surface sediment of Liaohe Estuarine Wetland (LEW), China. The optimization of initial ammonia nitrogen concentration, pH, carbon-nitrogen ratio, and petroleum hydrocarbons (PHCs) to improve the ammonia-oxidation capacity of the two bacterial strains was studied. Both bacterial strains showed a high ammonia nitrogen removal rate of over 80% under a high salinity of 10‰. Even at a temperature as low as 15°C, HXN-1 and HXN-2 could achieve an ammonia nitrogen removal rate of 53% and 62%, respectively. The cold- and salt-tolerant AOB in this study demonstrated a high potential for ammonia nitrogen removal from LEW.
为了在低温高盐环境中实现更好的污染物去除效率，从中国辽河河口湿地（LEW）的表层沉积物中分离出了两株新型耐冷耐盐氨氧化细菌（AOB），即苍白杆菌属（HXN - 1）和水微菌属（HXN - 2）。研究了初始氨氮浓度、pH值、碳氮比和石油烃（PHCs）对提高这两株细菌氨氧化能力的优化作用。在10‰的高盐度下，两株细菌均表现出超过80%的高氨氮去除率。即使在低至15°C的温度下，HXN - 1和HXN - 2的氨氮去除率也分别可达53%和62%。本研究中的耐冷耐盐AOB显示出从辽河河口湿地去除氨氮的巨大潜力。
