期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 54, 期 20, 页码 12959-12966出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.0c01469
关键词
-
资金
- Zhejiang Provincial Natural Science Foundation of China [LR20E080001]
- Natural Science Foundation of China [51878231]
- Shanghai Tongji Gao Tingyao Environmental Science and Technology Development Foundation
The implementation of mainstream anammox has gained increasing attention. In this study, the feasibility of using sidestream anammox granules to start up mainstream reactors was investigated by comparing two switching strategies. A maximum nitrogen removal potential of 3.6 +/- 0.2 kg N m(-3)d(-1) was obtained for the reactor after direct switching to mainstream conditions (70 mg TN L-1, 15 degrees C). Nevertheless, the reactor preacclimatized to 25 degrees C (Ma) exhibited a higher nitrogen removal potential of 7.0 +/- 0.3 kg N m d(-1) at 15 degrees C, which is the highest volumetric nitrogen removal rate of mainstream anammox reactors to date. Candidatus Kuenenia stuttgartiensis was identified as the dominant anammox bacterium, and its relative abundance in two reactors remained stable throughout the whole operation (200 days). Moreover, with the aid of acclimatization, the activation energy was reduced and the specific growth rate became higher. These results indicated that the physiological evolution of the dominant anammox bacterium instead of interspecies selection was the main reason for the high potential during the switch to mainstream conditions. Therefore, using sidestream anammox granules as seed sludge to start up mainstream reactors was demonstrated to be feasible, and a switching strategy of acclimatization at 25 degrees C was recommended.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据