Abstract:Two strains of heterotrophic nitrifying bacteria, ZW2 and ZW5, isolated from a bio-ceramic media reactor were studied for their characteristics of nitrification and nitrogen removal. Based on analysis of physiological and biochemical characters and sequence analysis of the 16S rDNA, strain ZW2 and ZW5 were identified as Pseudomonas sp. and Alcaligenes faecalis, respectively. The nitrification and denitrification could occur by the strains when they utilized organics. After 60h culture, the nitrogen removal rates by the strains were 43.90% and 48.52%, respectively. And COD removal rates by the strains were 67.48% and 78.21%, respectively. During the incubation process, there was almost no nitrite and low nitrate accumulation. Therefore, the two heterotrophic nitrifying bacteria had aerobic denitrification ability.
王弘宇, 马放, 杨开, 魏利, 苏俊峰, 张献旭. 两株异养硝化细菌的氨氮去除特性[J]. 中国环境科学, 2009, 29(1): 47-52.
WANG Hong-Yu, MA Fang, YANG Kai, WEI Li, SU Jun-Feng, ZHANG Xian-Xu. Ammonia removal by two strains of heterotrophic nitrifying bacteria.. CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(1): 47-52.