Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Transmembrane Pressure of Flat-sheet Membrane in Emulsion Type Cutting Oil Solution for Symmetric/Asymmetric Sinusoidal Flux Continuous Operation Mode

대칭/비대칭 사인파형 연속운전 방식에 따른 에멀젼형 절삭유 수용액 내 평막의 막간 차압

  • Won, In Hye (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology) ;
  • Lee, Hyeon Woo (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology) ;
  • Gwak, Hyeong Jun (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology) ;
  • Chung, Kun Yong (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology)
  • 원인혜 (서울과학기술대학교 화공생명공학과) ;
  • 이현우 (서울과학기술대학교 화공생명공학과) ;
  • 곽형준 (서울과학기술대학교 화공생명공학과) ;
  • 정건용 (서울과학기술대학교 화공생명공학과)
  • Received : 2015.07.31
  • Accepted : 2015.08.21
  • Published : 2015.08.31
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Abstract

In this study, permeation experiments were carried out using the symmetric and asymmetric sinusoidal flux continuous operation (SFCO) modes for the submerged flat sheet membrane in the 0.5 wt% emulsion type cutting oil solution. The effective area and nominal pore size of the used microfiltration membrane were $0.02m^2$ and $0.15{\mu}m$, respectively. The emulsion cutting oil was rejected over 99% based on turbidity. Transmembrane pressure increased lower as the aeration rates increased. The symmetric SFCO mode was a little more effective than the symmetric SFCO mode in low permeate flux between 10 and $15L/m^2{\cdot}h$. However, the symmetric SFCO mode was shown very effectively in high permeate flux between 25 and $30L/m^2{\cdot}h$.

본 연구에서는 0.5 wt% 에멀젼형 절삭유 수용액에 평막형 분리막을 침지시키고 대칭 및 비대칭 사인파형 투과유속 연속운전(SFCO) 방식으로 실험하였다. 사용한 정밀여과막은 유효 막면적이 $0.02m^2$이고 공칭 세공크기가 $0.15{\mu}m$이었다. 탁도 기준으로 에멀젼형 절삭유의 99% 이상이 제거되었으며 산기량이 증가할수록 TMP가 낮게 상승하였다. 비대칭형 SFCO 운전방식은 투과유속이 낮은 $10{\sim}15L/m^2{\cdot}h$ 영역에서 대칭형 SFCO 운전방식보다 다소 유리하였다. 하지만, 투과유속이 높은 $25{\sim}30L/m^2{\cdot}h$에서는 대칭형 SFCO 운전이 매우 효과적임을 확인할 수 있었다.

Keywords

References

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