Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Low Pressure Hybrid Membrane Processes for Drinking Water Treatment

저압 막여과 혼성공정을 이용한 고도 정수처리

  • Choo, Kwang-Ho (Department of Environmental Engineering, Kyungpook National University) ;
  • Chung, Ji-Hyun (Water Reseources Research Institute, K-Water) ;
  • Park, Hak-Soon (Department of Environmental Engineering, Kyungpook National University)
  • 추광호 (경북대학교 환경공학과) ;
  • 정지현 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 박학순 (경북대학교 환경공학과)
  • Published : 2007.09.30
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Abstract

Membrane filtration processes are increasingly popular for drinking water treatment that requires high quality of water. Low pressure membrane(LPM) processes such as microfiltration(MF) and ultrafiltration(UF), however, are ineffective in the removal of dissolved organic matter and also membrane fouling is still an important issue to be resolved. High pressure membranes(HPMs) may guarantee better water quality, but at the high energy consumption. Thus, various approaches to combine LPM processes with other physicochemical methods have been recently made to achieve their efficiency to the level comparable to that of HPM processes. In this work, therefore, hybrid processes that coupled MF/UF with coagulation, adsorption, chemical reactions(e.g., chelation and oxidation) are reviewed regarding system design and performance and also membrane surface modifications conducted by grafting and polyelectrolyte multilayer formation were assessed.

현재 막여과 공정은 정수처리에서 많은 관심을 받고 있다. 그러나 막여과 공정은 저압 운전이 가능한 정밀/한외여과 분리막을 이용할 때는 효과적인 용존성 유기물 제거가 이루어지지 않으며 막오염 현상으로 분리막의 투과도 감소가 일어난다. 고압 분리막을 이용할 경우 양질의 수질은 얻을 수 있으나 고압 운전으로 인하여 운전비용의 소모가 높다. 따라서 최근 분리막의 효율적인 정수처리 적용과 성능 향상을 위해서 다른 물리화학적 공정과 결합한 혼성공정에 대한 다양한 접근이 이루어지고 있다. 본 연구에서는 혼성공정으로 응집, 흡착, 특정 화학반응, 막표면 코팅 등과 정밀/한외여과 공정을 결합한 경우의 특징, 처리효율, 고려사항 등을 고찰하였다.

Keywords

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