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首页> 外文期刊>Water Research >Influence of hydrodynamic operating conditions on organic fouling of spiral-wound forward osmosis membranes: Fouling-induced performance deterioration in FO-RO hybrid system
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Influence of hydrodynamic operating conditions on organic fouling of spiral-wound forward osmosis membranes: Fouling-induced performance deterioration in FO-RO hybrid system

机译：流体动力运行条件对螺旋缠绕渗透膜有机污垢的影响：FO-RO杂交系统结垢诱导性能劣化

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摘要

The forward osmosis-reverse osmosis (FO-RO) hybrid process has been extensively researched as part of attempts to reduce the high energy consumption of conventional seawater reverse osmosis in recent years. FO operating conditions play a substantial role in the hybrid process, dictating not only the performance of the entire system but also the propensity for fouling, which deteriorates performance in long-term field operations. Therefore, determining the optimal FO operating conditions with regard to membrane fouling may promote sustainable operation through efficient fouling control. This study thus evaluated the influence of each hydrodynamic operating condition (feed flowrate, draw flowrate, and hydraulic pressure difference) and their synergistic effects on fouling propensity in a pilot-scale FO operation under seawater and municipal wastewater conditions. Fouling-induced variation in water flux, channel pressure drop, diluted concentration, and the resulting specific energy consumption (SEC) were comparatively analyzed and utilized to project performance variation in a full-scale FO-RO system. Fouling-induced performance reduction significantly varied depending on hydrodynamic operating conditions and the resultant fouling propensity during 15 days of continuous operation. A high feed flowrate demonstrated a clear ability to mitigate fouling-induced performance deterioration in all conditions. A high draw flowrate turned out to be detrimental for fouling propensity since its high reverse solute flux accelerated fouling growth. Applying additional hydraulic pressure during FO operation caused a faster reduction of water flux, and thus feed recovery and water production; however, these drawbacks could be compensated for by a 10% reduction in the required FO membrane area and an additional reduction in RO SEC. (C) 2020 Elsevier Ltd. All rights reserved.
机译：前渗透反渗透（FO-RO）混合过程已被广泛地研究了近年来减少常规海水反渗透的高能耗的尝试的一部分。 FO操作条件在混合过程中发挥了重要作用，不仅对整个系统的性能进行了决定，而且还决定了污垢的倾向，这使得长期现场操作中的性能降低。因此，确定关于膜污染的最佳Fo操作条件可以通过有效的污垢控制来促进可持续的操作。因此，该研究评估了每个流体动力运行条件（进料流量，抽取流量和液压差）的影响及其对海水和市政废水条件下的试验规模FO运行中的污垢倾向的协同影响。污染诱导的水通量，通道压降，稀释浓度和所得的特定能量消耗（SEC）进行比较分析，并利用满量程FO-RO系统的性能变化。污染诱导的性能降低根据流体动力运行条件和连续操作的15天内得到的污垢倾向显着变化。高饲料流量证明了在所有条件下减轻污垢诱导的性能劣化的明确能力。由于其高反向溶质通量加速污垢生长，因此高拉伸流量对污垢倾向有害。在FO操作期间施加额外的液压导致水通量的减少更快，从而进入恢复和水生产;然而，这些缺点可以通过所需的FO膜面积的减少10％，并且RO秒的额外减少。 （c）2020 elestvier有限公司保留所有权利。

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  • 来源
    《Water Research》 |2020年第15期|116154.1-116154.15|共15页
  • 作者

    Lee Chulmin; Nguyen Thanh-Tin; Adha Rusnang Syamsul; Shon Ho Kyong; Kim In S.;

  • 作者单位

    Gwangju Inst Sci & Technol GIST Sch Earth Sci & Environm Engn 123 Cheomdangwagi Ro Gwangju 61005 South Korea;

    Gwangju Inst Sci & Technol GIST Sch Earth Sci & Environm Engn 123 Cheomdangwagi Ro Gwangju 61005 South Korea;

    Gwangju Inst Sci & Technol GIST Sch Earth Sci & Environm Engn 123 Cheomdangwagi Ro Gwangju 61005 South Korea;

    Univ Technol Sydney Sch Civil & Environm Engn Post Box 129 Broadway NSW 2007 Australia;

    Gwangju Inst Sci & Technol GIST Sch Earth Sci & Environm Engn 123 Cheomdangwagi Ro Gwangju 61005 South Korea|Gwangju Inst Sci & Technol GIST Global Desalinat Res Ctr 123 Cheomdanwagi Ro Gwangju 61005 South Korea;

  • 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

    Forward osmosis; FO-RO hybrid Process; Membrane fouling; Field operation; Process simulation;

    机译：前进渗透;Fo-RO杂交过程;膜污垢;现场操作;过程模拟;

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