期刊
BIORESOURCE TECHNOLOGY
卷 216, 期 -, 页码 428-436出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.05.099
关键词
ZnO nanoparticles; Sequencing batch reactor; Nitrogen and phosphorus removal; Microbial enzymatic activity; Microbial community
资金
- National Natural Science Foundation of China [51178437]
The performance, microbial activity, and microbial community of a sequencing batch reactor ( SBR) were investigated under the long-term exposure of ZnO nanoparticles ( ZnO NPs). Low ZnO NPs concentration ( less than 5 mg/L) had no obvious effect on the SBR performance, whereas the removals of COD, NH4+-N, and phosphorus were affected at 10-60 mg/L ZnO NPs. The variation trend of nitrogen and phosphorus removal rate was similar to that of microbial enzymatic activity with the increase of ZnO NPs concentrations. The richness and diversity of microbial community showed obvious variations at different ZnO NPs concentrations. ZnO NPs appeared on the surface and cell interior of activated sludge, and the Zn contents in the effluent and activated sludge increased with the increase of ZnO NPS concentration. The present results provide use information to understand the effect of ZnO NPS on the performance of wastewater biological treatment systems. (C) 2016 Elsevier Ltd. All rights reserved.
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