Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, China.
Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Bioresour Technol. 2016 Sep;216:428-36. doi: 10.1016/j.biortech.2016.05.099. Epub 2016 May 26.
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 5mg/L) had no obvious effect on the SBR performance, whereas the removals of COD, NH4(+)-N, and phosphorus were affected at 10-60mg/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.
在长期暴露于氧化锌纳米粒子（ZnO NPs）的条件下，研究了序批式反应器（SBR）的性能、微生物活性和微生物群落。低浓度的 ZnO NPs（低于 5mg/L）对 SBR 的性能没有明显影响，而在 10-60mg/L ZnO NPs 浓度下，COD、NH4(+)-N 和磷的去除受到影响。氮和磷去除率的变化趋势与微生物酶活性的变化趋势相似，随着 ZnO NPs 浓度的增加而增加。在不同的 ZnO NPs 浓度下，微生物群落的丰富度和多样性表现出明显的变化。ZnO NPs 出现在活性污泥的表面和细胞内部，并且随着 ZnO NPS 浓度的增加，出水中和活性污泥中的 Zn 含量也增加。本研究结果为了解 ZnO NPS 对废水生物处理系统性能的影响提供了使用信息。
Environ Sci Technol. 2011-3-7
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