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首页> 外文期刊>Water Research >Combined coagulation-disk nitration process as a pretreatment of ultrafiltration and reverse osmosis membrane for wastewater reclamation: An autopsy study of a pilot plant
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Combined coagulation-disk nitration process as a pretreatment of ultrafiltration and reverse osmosis membrane for wastewater reclamation: An autopsy study of a pilot plant

机译：混凝-圆盘硝化联合工艺作为超滤和反渗透膜预处理的废水回收利用：中试工厂的尸检研究

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摘要

The effects of the combined coagulation-disk filtration (CC-DF) process on the fouling characteristics and behavior caused by interactions between effluent organic matter (EfOM) and the membrane surfaces of the ultrafiltration (UF) and reverse osmosis (RO) membranes in a pilot plant for municipal wastewater reclamation (MWR) were investigated. The feed water from secondary effluents was treated by the CC-DF process used as a pretreatment for the UF membrane to mitigate fouling formation and the permeate from the CC-DF process was further filtered by two UF membrane units in parallel arrangement and fed into four RO modules in a series connection. The CC-DF process was not sufficient to mitigate biofouling but the UF membrane was effective in mitigating biofouling on the RO membrane surfaces. Fouling of the UF and RO membranes was dominated by hydro-philic fractions of EfOM (e.g., polysaccharide-like and protein-like substances) and inorganic scaling (e.g., aluminum, calcium and silica). The desorbed UF membrane foulants included more aluminum species and hydrophobic fractions than the desorbed RO membrane foulants, which was presumably due to the residual coagulants and aluminum-humic substance complexes. The significant change in the surface chemistry of the RO membrane (a decrease in surface charge and an increase in contact angle of the fouled RO membranes) induced by the accumulation of hydrophilic EfOM onto the negatively charged RO membrane surface intensified the fouling formation of the fouled RO membrane by hydrophobic interaction between the humic substances of EfOM with relatively high hydrophobicity and the fouled RO membranes with decreased surface charge and increased contract angle.
机译：混凝-盘滤（CC-DF）工艺对污水中有机物（EfOM）与超滤（UF）和反渗透（RO）膜的相互作用所引起的结垢特性和行为的影响研究了市政污水回收中试工厂。来自二次废水的进料水通过CC-DF工艺进行处理，用作超滤膜的预处理，以减轻结垢的形成，并将来自CC-DF工艺的渗透液进一步由两个平行布置的UF膜单元过滤，并进料至四个串联连接的RO模块。 CC-DF工艺不足以减轻生物污染，但超滤膜可有效减轻RO膜表面的生物污染。 UF和RO膜的结垢主要由EfOM的亲水级分（例如，类多糖和蛋白质类物质）和无机结垢（例如，铝，钙和二氧化硅）所致。脱附的UF膜结垢物比脱附的RO膜结垢物包含更多的铝种类和疏水性部分，这大概是由于残留的凝结剂和铝腐殖质复合物。亲水性EfOM积聚在带负电的RO膜表面上引起的RO膜表面化学的显着变化（表面电荷的减少和RO膜的接触角的增加）加剧了结垢的形成。 RO膜通过具有较高疏水性的EfOM的腐殖质物质与结垢的RO膜之间的疏水相互作用而发生表面污染和收缩角增加的情况。

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  • 来源
    《Water Research》 |2012年第6期|p.1803-1816|共14页
  • 作者

    Kangmin Chon; Seung Joon Kim; Jihee Moon; Jaeweon Cho;

  • 作者单位

    School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-guiagiro, Buk-gu, Gwangju 500-712, Republic of Korea;

    Environmental Research Team, Research & Development Institute, Kolon Engineering & Construction, 199-5 Jeondae-ri, Pogok-eup, Cheoin-gu, Yongin, Gyeonggi 449-815, Republic of Korea;

    Construction Technology Examination Division, Machinery Metals & Construction Examination Bureau, Government Complex-Daejeon, 139 Seonsa-ro, Seo-gu, Daejeon 302-701, Republic of Korea;

    School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-guiagiro, Buk-gu, Gwangju 500-712, Republic of 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

    combined coagulation-disk filtration process; effluent organic matter; membrane autopsy; ultrafiltration; reverse osmosis membrane; municipal wastewater reclamation;

    机译：混凝-圆盘过滤工艺废水有机物;膜尸检超滤反渗透膜市政废水回收;

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