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首页> 外文期刊>Water Research >Critical flux and chemical cleaning-in-place during the long- term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment
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Critical flux and chemical cleaning-in-place during the long- term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment

机译：中试规模的水下膜生物反应器长期运行中用于市政废水处理的临界流量和就地化学清洗

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摘要

The critical flux and chemical cleaning-in-place (CIP) in a long-term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment were investigated. Steady filtration under high flux (30 L/(m2 h)) was successfully achieved due to effective membrane fouling control by sub-critical flux operation and chemical CIP with sodium hypochlorite (NaCIO) in both trans-membrane pressure (TMP) controlling mode (cleaning with high concentration NaCIO of 2000-3000 mg/L in terms of effective chorine was performed when TMP rose to 15 kPa) and time controlling mode (cleanings were performed weekly and monthly respectively with low concentration NaCIO (500-1000 mg/L) and high concentration NaCIO (3000 mg/L)). Microscopic analysis on membrane fibers before and after high concentration NaCIO was also conducted. Images of scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that NaCIO CIP could effectively remove gel layer, the dominant fouling under sub-critical flux operation. Porosity measurements indicated that NaCIO CIP could partially remove pore blockage fouling. The analyses from fourier transform infrared spectrometry (FTIR) with attenuated total reflectance accessory (ATR) and energy dispersive spectrometer (EDS) demonstrated that protein-like macromolecular organics and inorganics were the important components of the fouling layer. The analysis of effluent quality before and after NaCIO CIP showed no obvious effect on effluent quality.
机译：研究了用于市政污水处理的中试浸没式膜生物反应器长期运行中的临界通量和就地化学清洗（CIP）。高通量（30 L /（m2 h））下的稳定过滤已成功实现，这是因为在跨膜压（TMP）控制模式下，通过亚临界通量操作和次氯酸钠（NaCIO）进行化学CIP进行了有效的膜污染控制（当TMP升至15 kPa时，用有效氯化钠进行2000-3000 mg / L的高浓度NaCIO清洗）和时间控制模式（低浓度NaCIO（500-1000 mg / L）分别每周和每月清洗一次和高浓度NaCIO（3000 mg / L）。还对高浓度NaCIO之前和之后的膜纤维进行了显微镜分析。扫描电子显微镜（SEM）和原子力显微镜（AFM）的图像显示，NaCIO CIP可以有效去除凝胶层，这是在亚临界通量操作下的主要污垢。孔隙率测量表明，NaCIO CIP可以部分去除堵塞的污垢。傅立叶变换红外光谱仪（FTIR），衰减全反射附件（ATR）和能量色散仪（EDS）的分析表明，类蛋白质大分子有机物和无机物是污垢层的重要组成部分。 NaCIO CIP前后的出水水质分析显示出对出水水质无明显影响。

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  • 来源
    《Water Research》 |2011年第2期|p.863-871|共9页
  • 作者

    Chun-Hai Wei; Xia Huang; Roger Ben Aim; Kazuo Yamamoto; Gary Amy;

  • 作者单位

    State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering,Tsinghua University, Beijing 100084, ChinarnWater Desalination and Reuse Center, 4700 King Abdullah University 0/Science and Technology, Thuvjal 23955-6900, Saudi Arabia;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering,Tsinghua University, Beijing 100084, China;

    Universite de Toulouse INSA, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France;

    Environmental Science Center, The University of Tokyo, 7-3-1 Hongo, Bunfeyo-Ku, Tokyo 113-0033, Japan;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering,Tsinghua University, Beijing 100084, 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

    chemical cleaning-in-place; membrane fouling; municipal wastewater; critical flux; submerged membrane bioreactor;

    机译：就地化学清洗;膜结垢城市废水;临界通量浸没膜生物反应器;

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