Membrane and Water Treatment

  • 제13권1호
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  • Pages.39-49
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  • 2022
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  • 2005-8624(pISSN)
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  • 2092-7037(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effect of intermittent operation modes on performance of reverse osmosis (RO) membrane in desalination and water treatment

  • Yang, Heungsik (School of Civil and Environmental Engineering, Kookmin University) ;
  • Choi, Jihyeok (School of Civil and Environmental Engineering, Kookmin University) ;
  • Choi, Yongjun (School of Civil and Environmental Engineering, Kookmin University) ;
  • Lee, Sangho (School of Civil and Environmental Engineering, Kookmin University)
  • 투고 : 2021.06.17
  • 심사 : 2021.09.28
  • 발행 : 2022.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Seawater desalination is doubtlessly a viable option to supply fresh drinking water. Nevertheless, RO (reverse osmosis) desalination plants in specific areas may be intermittently operated to match the imbalance between water demand and supply. Although a handful of works have been done on other membrane systems, few studies have attempted to mitigate fouling in intermittent RO systems. Accordingly, the objectives of this paper were to examine the effect of the intermittent operation on RO fouling; and to compare four intermittent operation modes including feed solution recirculation, membrane storage in the feed solution, deionized water (DI) recirculation, and membrane storage in DI water. Results showed that intermittent operation reduced RO fouling under several conditions. However, the extents of fouling mitigation were different depending on the feed conditions, foulant types, and membrane lay-up methods. When the feed solution was recirculated during the lay-up, the restoration of the flux was less significant than that by the feed solution feed-up. The use of deionized water during the lay-up was effective to restore flux, especially when the feed solution contains scale-forming salts (CaSO4) and/or colloidal silica.

키워드

과제정보

This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Environmental facility disaster damage prevention and optimal operation technology development project, funded by Korea Ministry of Environment (MOE) (grant number) (1485017874)

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