Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Ceramic based Nanofiltration Membrane for Wastewater Treatment: A Review

폐수처리를 위한 세라믹계 나노여과막: 리뷰

  • Yeonsoo, Kwak (Energy and Environmental Science and Engineering, Integrated Science and Engineering Division, Underwood International College, Yonsei University) ;
  • Rajkumar, Patel (Energy and Environmental Science and Engineering, Integrated Science and Engineering Division, Underwood International College, Yonsei University)
  • 곽연수 (연세대학교 언더우드학부 생명과학공학과) ;
  • 라즈쿠마 파텔 (연세대학교 언더우드학부 생명과학공학과)
  • Received : 2022.11.10
  • Accepted : 2022.12.15
  • Published : 2022.12.31
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Abstract

Nanofiltration (NF) membranes are more popular than reverse osmosis (RO) membranes as they can be operated at much lower pressures for applications in treatment of wastewater from industries like food processing and pharmaceutical as well as municipal sewage water. The separation mechanism in case of NF membranes is based on solution diffusion as well as sieving, for which the crosslinking density of the thin film of the composite membrane is less then RO membrane. Unlike ceramic membranes, membrane fouling is one of the chronic problems that occur during the nanofiltration process in polymeric membranes. Membrane cleaning is done to get rid of reversible as well as irreversible fouling by treatment with sodium hypochlorite. Compared to polymeric membranes, ceramic membranes show higher stability against these agents. In this review different types of ceramic membrane applied wastewater treatment by NF process are discussed.

나노여과막(NF)은 식품가공, 제약 등 폐수는 물론 지자체 하수처리시설에서 배출되는 폐수 처리에 있어 훨씬 낮은 압력으로 운용이 가능해 역삼투막(RO)보다 인기가 높다. NF막의 경우 분리 메커니즘은 투과확산 기작과 더불어 RO 박막보다 낮은 가교밀도로 인한 체거름 메커니즘이다. 막 오염은 세라믹 막과 달리 고분자 막의 경우 나노 여과 공정의 고질적인 문제 중 하나이다. 이러한 문제를 해결하기 위해 차아염소산나트륨을 사용한 멤브레인 세척이 이루어진다. 폴리머 멤브레인에 비해 세라믹 멤브레인은 이러한 화합물에 매우 안정적이다. 본 리뷰에서는 NF 프로세스에 의한 폐수 처리의 다양한 유형의 세라믹 막 적용에 대해 논의한다.

Keywords

References

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