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, Qingdao 266100, China.
Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Bioresour Technol. 2017 Aug;238:361-368. doi: 10.1016/j.biortech.2017.04.069. Epub 2017 Apr 21.
The long-term impacts of titanium dioxide nanoparticles (TiO NPs) on the performance and microbial community of activated sludge were evaluated in a sequencing batch reactor (SBR). TiO NPs impacted the COD and phosphorus removals of activated sludge, whereas the NH-N removal efficiency had no distinct change at 0-60mg/L TiO NPs. The presence of TiO NPs obviously inhibited the organic matter and nitrogen removal rates of activated sludge. The phosphorus removal rate gradually reduced at 0-5mg/L TiO NPs and then increased at 10-60mg/L TiO NPs. The removal rates of organic matter, nitrogen and phosphorus had the similar varying trends to the corresponding microbial enzymatic activities. High TiO NPs concentration promoted more reactive oxygen species (ROS) production and lactate dehydrogenase (LDH) release of activated sludge. The microbial richness and diversity of activated sludge were obviously affected at the phyla, class and genus levels.
采用序批式反应器（SBR）评价了二氧化钛纳米颗粒（TiO NPs）对活性污泥性能和微生物群落的长期影响。TiO NPs 会影响活性污泥的 COD 和磷去除效果，但在 0-60mg/L TiO NPs 浓度范围内，NH-N 去除效率没有明显变化。TiO NPs 的存在明显抑制了活性污泥的有机物和氮去除速率。在 0-5mg/L TiO NPs 时，磷去除率逐渐降低，而在 10-60mg/L TiO NPs 时则增加。有机物、氮和磷的去除率与相应的微生物酶活性有相似的变化趋势。高浓度 TiO NPs 会促进活性污泥中更多活性氧（ROS）的产生和乳酸脱氢酶（LDH）的释放。TiO NPs 对活性污泥的微生物丰富度和多样性在门、纲和属水平上都有明显的影响。
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