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首页> 外文期刊>Water Research >Potential effects of loading nano zero valent iron discharged on membrane fouling in an anoxic/oxic membrane bioreactor
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Potential effects of loading nano zero valent iron discharged on membrane fouling in an anoxic/oxic membrane bioreactor

机译：负载的纳米零价铁负载对缺氧/氧化膜生物反应器中膜污染的潜在影响

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摘要

A laboratory-scale submerged anoxic-oxic membrane bioreactor for municipal wastewater was operated to investigate the potential effects of loading suspended nano zero valent iron (nZVI, 25 and 50 mg/L) discharged on the membrane fouling. nZVI transformed rapidly into Fen+, generated reactive oxygen species (ROS) and caused oxidative stress. This result rapidly led to the cell lysis and bacteria death, and further resulted in the decrease of biomass and extracellular polymeric substances (EPS). nZVI also thinned the membrane fouling layer. But nZVI had no obvious effects on activated sludge particle size, EPS molecule weight distribution and VOCs constitution of membrane foulant Additionally, nZVI released Fen} and mitigated the inorganic (mainly Si element) fouling through Fen+ flocculation. Consequently, membrane fouling mitigation with nZVI discharged was mainly due to oxidative stress to bacteria and Fen} flocculation of nZVI. (C) 2017 Elsevier Ltd. All rights reserved.
机译：运行了一个实验室规模的用于市政废水的浸没式缺氧-氧气膜生物反应器，以研究负载的悬浮纳米零价铁（nZVI，25和50 mg / L）对膜污染的潜在影响。 nZVI迅速转变为Fen +，产生活性氧（ROS）并引起氧化应激。该结果迅速导致细胞裂解和细菌死亡，并进一步导致生物量和细胞外聚合物（EPS）的减少。 nZVI也使膜污染层变薄。但是nZVI对活性污泥的粒径，EPS分子量分布和膜污垢的VOC组成没有明显影响。此外，nZVI释放Fen}，并通过Fen +絮凝减轻了无机污垢（主要是Si元素）。因此，排放nZVI的膜结垢缓解主要是由于细菌的氧化应激和nZVI的絮凝。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Water Research》 |2017年第15期|140-146|共7页
  • 作者

    Zhou Lijie; Zhuang Weiqin; Wang Xin; Yu Ke; Yang Shufang; Xia Siqing;

  • 作者单位

    Shenzhen Acad Environm Sci, Shenzhen Key Lab Emerging Contaminants Detect & C, Shenzhen Key Lab Drinking Water Source Safety Con, State Environm Protect Key Lab Drinking Water Sou, Shenzhen 518001, Guangdong, Peoples R China|Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China;

    Univ Auckland, Dept Civil & Environm Engn, Auckland 1142, New Zealand;

    Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China;

    Peking Univ, Shenzhen Grad Sch, Sch Environm & Energy, Shenzhen 518055, Guangdong, Peoples R China;

    Shenzhen Municipal Design & Res Inst Co Ltd, 3007 West Sungang Rd, Shenzhen 518029, Guangdong, Peoples R China;

    Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nano zero valent iron (nZVI); Membrane bioreactor; Membrane fouling; Reactive oxygen species;

    机译：纳米零价铁（nZVI）;膜生物反应器;膜污染;活性氧;

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