Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Hybrid Water Treatment of Photocatalyst Coated Polypropylene Beads and Ceramic Membranes: Effect of Membrane and Water Back-flushing Period

광촉매 코팅 폴리프로필렌 구와 세라믹 분리막의 혼성수처리: 분리막과 물 역세척 주기의 영향

  • Park, Jin Yong (Department of Environmental Sciences & Biotechnology, Hallym University) ;
  • Hwang, Jung Hye (Department of Environmental Sciences & Biotechnology, Hallym University)
  • 박진용 (한림대학교 환경생명공학과) ;
  • 황정혜 (한림대학교 환경생명공학과)
  • Received : 2013.05.31
  • Accepted : 2013.06.13
  • Published : 2013.06.30
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Abstract

Effect of water back-flushing period (FT) was investigated in hybrid water treatment process of carbon ultrafiltration and polypropylene (PP) beads coated with photocatalyst, and membrane effect was studied by comparing the previous studies with carbon microfiltration or alumina ultrafiltration, microfiltration membranes. FT 6 min was the most effective to control initial membrane fouling and optimal condition because the membrane fouling resistance was low until initial 60 min and the maximum total permeate volume was acquired at this FT. The turbidity treatment efficiency was high beyond 98.6%, and did not depend on FT, which was same with the previous result of carbon or alumina microfiltration. The organic matters treatment efficiency was the highest value of 98.2% at FT 6 min, which was almost same trend with the previous result of alumina microfiltration. Then the organic matters treatment efficiency of carbon microfiltration was the minimum at no back-flushing (NBF) and increased as decreasing FT, but that of alumina ultrafiltration was the maximum at NBF and also increased as decreasing FT. Therefore it means that water back-flushing effect on the organic matters treatment efficiency had a different mechanism depending on pore size in spite of the same material membranes.

탄소 한외여과 및 광촉매 코팅 폴리프로필렌(PP) 구의 혼성수처리 공정에서 물 역세척 주기(FT)의 영향을 알아보고, 탄소 정밀여과막 또는 알루미나 한외여과막 및 정밀여과막을 사용한 기존 결과들과 비교하여 분리막의 영향을 고찰하였다. FT 6분일 때 초기 60분까지 최소 막오염 저항을 보이고 최대 총여과부피를 얻어서, FT 6분이 초기 막오염의 억제에 가장 효과적이고 최적 조건이다. 탁도의 처리효율은 98.6% 이상이며 FT 변화의 영향이 보이지 않았는데, 탄소 또는 알루미나 정밀여과막을 사용한 기존 연구와 일치하는 것이다. 유기물의 처리효율은 FT 6분에서 98.2%로 최대값을 보였는데, 알루미나 정밀여과막의 결과와 유사하다. 반면에 탄소 정밀여과막에서는 유기물의 처리효율이 비역세척(NBF)에서 최소이고 FT가 감소할수록 증가하였으나, 알루미나 한외여과막에서는 NBF에서 최대이고 FT가 감소할수록 역시 증가하였다. 따라서 유기물 처리효율에 대한 물 역세척 주기의 영향은 동일한 재질의 분리막이라도 기공 크기에 따라 다른 기작을 보인다는 것을 알 수 있었다.

Keywords

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