Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Transmembrane Pressures with Respect to Backwashing and Sinusoidal Flux Continuous Operation Modes for the Submerged Hollow Fiber Membrane in the Activated Sludge Solution

활성슬러지 수용액 내 침지식 중공사막의 역세척 및 사인파형 연속투과 운전방식에 따른 막간차압

  • Jeong, Doin (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology) ;
  • Jung, Seung Hee (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology) ;
  • Lee, Sohl (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)
  • 정도인 (서울과학기술대학교 화공생명공학과) ;
  • 정승희 (서울과학기술대학교 화공생명공학과) ;
  • 이솔 (서울과학기술대학교 화공생명공학과) ;
  • 정건용 (서울과학기술대학교 화공생명공학과)
  • Received : 2015.12.09
  • Accepted : 2015.12.22
  • Published : 2015.12.31
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Abstract

In this study transmembrane pressure (TMP) was measured with respect to operational time by applying the sinusoidal flux continuous operation (SFCO) for the hollow fiber membrane. The hollow fiber module which has $100cm^2$ of effective area and $0.45{\mu}m$ nominal pore size was submerged in the activated sludge solution of MLSS 5,000 mg/L. The critical permeate flux was measured as $26.6L/m^2{\cdot}hr$ by the method of continuous flux step change. TMPs of the filtration/relaxation (FR), FR with backwashing (FR/BW) and SFCO modes were measured. The SFCO mode was more effective than FR and FR/BW modes below the critical permeate flux such as 15, 20 and $25L/m^2{\cdot}hr$. However, the FR/BW was confirmed as more effectively fouling controlled mode than SFCO mode above the critical permeate flux.

본 연구에서는 사인파형 투과유속 운전방식을 중공사형 분리막에 적용하여 운전시간에 따른 막간차압(TMP)을 측정하였다. 유효 막면적이 $100cm^2$이고 공칭 세공크기가 $0.45{\mu}m$인 중공사막 모듈을 MLSS 5,000 mg/L 활성슬러지 용액으로 투과 실험하였다. 연속적인 단계별 투과유속 변화법으로 임계 투과유속을 측정하였으며 그 값은 $26.6L/m^2{\cdot}hr$이었다. 여과운전/정지이완(FR), 정지이완시 역세척(FR/BW) 및 사인파형 투과유속 연속운전(SFCO) 방식에 따른 TMP를 측정하였다. 임계 투과유속보다 낮은 15, 20 및 $25L/m^2{\cdot}hr$에서는 SFCO 운전방식이 FR 및 FR/BW에 비하여 효과적이었다. 그러나 임계 투과유속 이상에서는 FR/BW 운전방식이 SFCO보다 효과적으로 막오염을 제어할 수 있음을 확인하였다.

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References

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