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首页> 外文期刊>Environmental Science & Technology >Removal of Trace Organic Chemicals and Performance of a Novel Hybrid Ultrafiltration-Osmotic Membrane Bioreactor
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Removal of Trace Organic Chemicals and Performance of a Novel Hybrid Ultrafiltration-Osmotic Membrane Bioreactor

机译：微量有机化学物质的去除及新型混合超滤-渗透膜生物反应器的性能

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摘要

A hybrid ultrafiltration-osmotic membrane bioreactor (UFO-MBR) was investigated for over 35 days for nutrient and trace organic chemical (TOrC) removal from municipal wastewater. The UFO-MBR system uses both ultrafiltration (UF) and forward osmosis (FO) membranes in parallel to simultaneously extract clean water from an activated sludge reactor for nonpotable (or environmental discharge) and potable reuse, respectively. In the FO stream, water is drawn by osmosis from activated sludge through an FO membrane into a draw solution (DS), which becomes diluted during the process. A reverse osmosis (RO) system is then used to reconcentrate the diluted OS and produce clean water suitable for direct potable reuse. The UF membrane extracts water, dissolved salts, and some nutrients from the system to prevent their accumulation in the activated sludge of the osmotic MBR. The UF permeate can be used for nonpotable reuse purposes (e.g., irrigation and toilet flushing). Results from UFO-MBR investigation illustrated that the chemical oxygen demand, total nitrogen, and total phosphorus removals were greater than 99%, 82%, and 99%, respectively. Twenty TOrCs were detected in the municipal wastewater that was used as feed to the UFO-MBR system. Among these 20 TOrCs, 15 were removed by the hybrid UFO-MBR system to below the detection limit. High FO membrane rejection was observed for all ionic and nonionic hydrophilic TOrCs and lower rejection was observed for nonionic hydrophobic TOrCs. With the exceptions of bisphenol A and DEET, all TOrCs that were detected in the DS were well rejected by the RO membrane. Overall, the UFO-MBR can operate sustainably and has the potential to be utilized for direct potable reuse applications.
机译：混合超滤-渗透膜生物反应器（UFO-MBR）进行了超过35天的研究，用于去除市政废水中的营养物和痕量有机化学物质（TOrC）。 UFO-MBR系统同时使用超滤（UF）和正渗透（FO）膜，以同时从活性污泥反应器中提取净水，分别用于非饮用水（或环境排放）和饮用水的再利用。在FO流中，水通过渗透作用从活性污泥中通过FO膜被抽入汲取溶液（DS），该溶液在处理过程中被稀释。然后，使用反渗透（RO）系统来浓缩稀释的OS，并产生适合直接饮用的净水。 UF膜从系统中提取水，溶解的盐和一些养分，以防止它们积聚在渗透MBR的活性污泥中。 UF渗透物可用于非饮用水的重复使用目的（例如灌溉和厕所冲洗）。 UFO-MBR调查的结果表明，化学需氧量，总氮和总磷去除率分别大于99％，82％和99％。在市政废水中检测到二十种TOrC，这些废水用作UFO-MBR系统的进料。在这20种TOrC中，有15种被混合UFO-MBR系统去除至检测限以下。对于所有离子型和非离子型亲水性TOrC，观察到高FO膜截留率，而对于非离子型疏水性TOrC，则观察到较低的截留率。除双酚A和DEET外，在DS中检测到的所有TOrC均被RO膜很好地排斥。总体而言，UFO-MBR可以持续运行，并且有潜力用于直接的饮用水重复使用应用。

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  • 来源
    《Environmental Science & Technology》 |2014年第18期|10859-10868|共10页
  • 作者

    Ryan W. Holloway; Julia Regnery; Long D. Nghiem; Tzahi Y. Cath;

  • 作者单位

    Colorado School of Mines, Golden, Colorado 80401, United States;

    Colorado School of Mines, Golden, Colorado 80401, United States;

    University of Wollongong, Wollongong, NSW 2522, Australia;

    Colorado School of Mines, Golden, Colorado 80401, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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