Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effect of Hydraulic Pressure on Organic Fouling in Pressure Retarded Osmosis (PRO) Process

압력지연삼투 (PRO) 공정에서 유도용액에서의 압력이 유기물 파울링에 미치는 영향

  • Suh, Dongwoo (World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Institute of Chemical Processes (ICP)) ;
  • Yoon, Hongsik (World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Institute of Chemical Processes (ICP)) ;
  • Yoon, Jeyong (World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Institute of Chemical Processes (ICP))
  • 서동우 (서울대학교 공과대학 화학생물공학부 에너지환경화학융합기술) ;
  • 윤홍식 (서울대학교 공과대학 화학생물공학부 에너지환경화학융합기술) ;
  • 윤제용 (서울대학교 공과대학 화학생물공학부 에너지환경화학융합기술)
  • Received : 2014.12.05
  • Accepted : 2015.02.15
  • Published : 2015.02.15
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Abstract

Pressure retarded osmosis (PRO) process is one of membrane processes for harvesting renewable energy by using salinity difference between feed and draw solutions. Power is generated by permeation flux multiplied by hydraulic pressure in draw side. Membrane fouling phenomena in PRO process is presumed to be less sever, but it is inevitable. Membrane fouling in PRO process decreases water permeation through membrane, resulting in significant power production decline. This study intended to investigate the effect of hydraulic pressure in PRO process on alginate induced organic fouling as high and low hydraulic pressures (6.5 bar and 12 bar) were applied for 24 h under the same initial water flux. In addition, organic fouling in draw side from the presence of foulant (sodium alginate) in draw solution was examined. As major results, hydraulic pressure was found to be not a significant factor affecting in PRO organic fouling as long as the same initial water flux is maintained, inidicating that operating PRO process with high hydraulic pressure for efficient energy harvesting will not cause severe organic fouling. In addition, flux decline was negligible from the presence of organic foulant in draw side.

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References

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