Short-term and long-term effects of Cu nanoparticles on partial nitrification process

被引：0

作者：

Zhang X. ^{[1
]}

Zhou Y. ^{[1
]}

Fu H. ^{[1
]}

Chen T. ^{[1
]}

Zhang R. ^{[1
]}

Zhang J. ^{[1
]}

机构：

[1] Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, Zhengzhou

[2] State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology), Harbin

来源：

Zhang, Jie (hitzhangjie@163.com) | 2018年 / Harbin Institute of Technology卷 / 50期

关键词：

AOB; Autotrophic nitrogen removal; Cu nanoparticles; NOB; Partial nitrification;

D O I：

10.11918/j.issn.0367-6234.201706009

中图分类号：

学科分类号：

摘要：

The short-term and long-term effects of Cu nanoparticles (NPs) on partial nitrification (PN) process were studied in SBR. The ammonia oxidation rate, nitrogen removal and sludge property were analyzed within exposure of different concentrations of Cu NPs. The short-term result suggested that the Cu NPs with 1 mg/L was beneficial for PN process, while the NPs in 3-30 mg/L significantly inhibit PN. As a result, the ammonia oxidation rate decreased to 21.9%-44.9% of the initial value. When the Cu NPs was 50 mg/L, the PN process was enhanced, which was mainly because the aggregation reduced the actual concentration of NPs acting on the microorganisms. Long-term exposure within low Cu NPs (1 mg/L) could also suppress the PN process, and the ammonia removal efficiency decreased to 44.8% from 91%. The ammonia-oxidizing bacteria was more severe to the Cu NPs than nitrite-oxidizing bacteria. After the long-term exposure, the copper and extracellular polymeric substance in sludge both increased, and then decreased when no Cu NPs was added to the PN system anymore. Cu NPs performed a significant effect on microbial activity, nitrogen removal ability and sludge property. © 2018, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

引用

页码：14 / 19

页数：5

共 20 条

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