Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Permeation Characteristics of the Submerged Membrane Module Using the Rotating Disks

회전원판을 이용한 침지형 분리막 모듈의 투과특성

  • Chung Kun-Yong (Department of Chemical Engineering, Seoul National University of Technology) ;
  • Cho Young-Su (Department of Chemical Engineering, Seoul National University of Technology) ;
  • Kim Jong-Pyo (Department of Chemical Engineering, Yonsei University)
  • 정건용 (서울산업대학교 화학공학과) ;
  • 조영수 (서울산업대학교 화학공학과) ;
  • 김종표 (연세대학교 화학공학과)
  • Published : 2006.03.01
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Abstract

The permeation experiments were carried out for the submerged membrane module equipped with self-designed rotating disks in order to determine the effect of fouling reduction and the optimum operating conditions as a function of operating time. Kaolin and bentonite particles were used to prepare various concentrations of feed solution. Every experiment was continued until 60 minutes at various rotating disk speeds up to 120 rpm. The suction pressure for kaolin solutions decreased to 28% by using rotating disk to decrease the fouling. Also, the optimum permeation flux decreased as kaolin concentration increased, and became 60 to 70 LMH for 0.4 wt% of kaolin solution. The suction pressure for bentonite experiment approached to 0 mmHg at 30 LMH and above 80 rpm rotating disk speed.

본 연구는 침지형 분리막 모듈에 자체 설계한 회전원판을 적용하여 운전시간 경과에 따른 막오염 감소효과와 최적의 운전조건을 투과실험으로 알아보았다. 원료용액으로는 kaolin과 bentonite를 농도별로 제조하여 사용하였고, 원판의 회전수를 120 rpm까지 변화시키면서 60분 동안 실험하였다. 회전원판에 의한 막오염 감소 효과로 kaolin 수용액을 대상으로 한 실험에서는 흡입압력이 약 28%까지 감소하였다. 또한 kaolin 농도에 따라서 최적 투과유속이 감소하였으며 0.4wt% 일 경우는 60 내지 70 LMH가 적당하였다. Bentonite 수용액에 대하여 투과유속이 30 LMH 일 경우에 원판의 회전속도가 80 rpm 이상이 되면 흡입압력이 대략 0 mmHg에 접근하였다.

Keywords

References

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