期刊
BIORESOURCE TECHNOLOGY
卷 356, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127287
关键词
Nitrogen removal; Sulfide-dependent autotrophic denitrification; Anammox; Gel immobilization; Microbial communities
资金
- National Natural Science Foundation of China [51978278]
- Natural Science Foundation of Guangdong Province, China [2020A1515010403]
This study applied gel immobilization technology to the ASDAD coupling system and found that the optimal S2-/NO3- ratio was 0.6, resulting in the highest TN removal efficiency. Additionally, immobilized sludge cubes attenuated the effects of temperature on microorganisms.
Anammox and sulfide-dependent autotrophic denitrification (ASDAD) coupling system can improve the nitrogen removal, but high sulfide concentration will affect the activity of anaerobic ammonia-oxidizing bacteria (AnAOB). Gel immobilization technology can enhance the survivability of microorganisms in unsuitable environments. Therefore, in this investigation, gel immobilization technology was applied into the ASDAD coupling system to explore the removal performance and microbial communities. The results showed that the optimal S2-/ NO3- was 0.6, under which the best TN removal efficiency was 85.69%. The removal performance of ASDAD coupling system was stable under rapid variations of nitrogen loading rate and sulfide loading rate. Immobilized sludge cubes could attenuate the effects of temperature on AnAOB and sulfide-oxidizing bacteria. Observations of SEM and stereoscope suggested that AnAOB was more likely to exist on the surface of the sludge cubes. Thiobacillus, Candidatus Brocadia, and Candidatus Kuenenia were the main functional bacteria in the coupling system.
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