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磁性 FeO 纳米颗粒对长期暴露于序批式反应器中的活性污泥性能和微生物群落的影响。

Magnetic FeO nanoparticles induced effects on performance and microbial community of activated sludge from a sequencing batch reactor under long-term exposure.

机构信息

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, Ocean University of China, Qingdao 266100, China.

Shcool of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.

出版信息

Bioresour Technol. 2017 Feb;225:377-385. doi: 10.1016/j.biortech.2016.11.130. Epub 2016 Dec 2.

DOI:10.1016/j.biortech.2016.11.130
PMID:27956330
Abstract

The performance and microbial community of activated sludge from a sequencing batch reactor (SBR) were investigated under long-term exposure of magnetic FeO nanoparticles (FeO NPs). The COD removal showed a slight decrease at 5-60mg/L FeO NPs compared to 0mg/L FeO NPs, whereas the NH-N removal had no obvious variation at 0-60mg/L FeO NPs. It was found that 10-60mg/L FeO NPs improved the denitrification process and phosphorus removal of activated sludge. The microbial enzymatic activities of activated sludge could be affected by FeO NPs, which had similar variation trends to the nitrogen and phosphorus removal rates of activated sludge. The reactive oxygen species (ROS) production and lactate dehydrogenase (LDH) release demonstrated that FeO NPs led to the toxicity to activated sludge and destroyed the integrity of microbial cytomembrane. High throughput sequencing indicated that FeO NPs could obviously affect the microbial richness and diversity of activated sludge.

摘要

在长期暴露于磁性 FeO 纳米粒子 (FeO NPs) 的条件下，研究了序批式反应器 (SBR) 中活性污泥的性能和微生物群落。与 0mg/L FeO NPs 相比，在 5-60mg/L FeO NPs 下 COD 去除率略有下降，而在 0-60mg/L FeO NPs 下 NH-N 去除率没有明显变化。结果表明，10-60mg/L FeO NPs 改善了活性污泥的反硝化过程和磷去除效果。FeO NPs 可能会影响活性污泥中的微生物酶活性，其变化趋势与活性污泥的氮磷去除率相似。活性氧 (ROS) 产生和乳酸脱氢酶 (LDH) 释放表明，FeO NPs 导致了活性污泥的毒性，并破坏了微生物细胞质膜的完整性。高通量测序表明，FeO NPs 可以明显影响活性污泥的微生物丰富度和多样性。

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Magnetic FeO nanoparticles induced effects on performance and microbial community of activated sludge from a sequencing batch reactor under long-term exposure.

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