Effect of dissolve oxygen on the microbial community of the nitrite-oxidizing bacteria in an intermittent aeration reactor
BAO Peng, WANG Shu-ying, MA Bin, ZHANG Qiong, PENG Yong-zhen
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
Nitrospira and Nitrobacter are two dominant types of nitrite-oxidizing bacteria (NOB).To evaluate the effect of dissolved oxygen (DO) on microbial community of NOB under the intermittent-aeration mode, the population and microbial community of this two NOB types were investigated in an aeration reactor with low DO period (55d) and high DO period (113d). Results showed the population of Nitrospira was much higher than that of Nitrobacter during the low DO period (0.2~0.5mg/L), and most clones of Nitrospira was very similar to the clone Candidatus Nitrospira defluvii. After increasing DO to a high level (1.5~2.3mg/L) and operating for 113d, Nitrobacter turned to the dominant group. Most clones of Nitrobacter were distributed to the branch containin Nitrobacter winogradskyi. Furthermore, the nitrite accumulation occurred in this reactor during the shift of population between Nitrospira and Nitrobacter after increasing DO, and it gradually disappeared when Nitrobacter became the dominant NOB group.
包鹏, 王淑莹, 马斌, 张琼, 彭永臻. 不同溶解氧间歇曝气对亚硝酸盐氧化菌的影响[J]. 中国环境科学, 2016, 36(9): 2696-2702.
BAO Peng, WANG Shu-ying, MA Bin, ZHANG Qiong, PENG Yong-zhen. Effect of dissolve oxygen on the microbial community of the nitrite-oxidizing bacteria in an intermittent aeration reactor. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(9): 2696-2702.
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