Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effects of membrane fouling formation by feed water quality and membrane flux in water treatment process using ceramic membrane

세라믹 막여과 정수처리 공정에서 유입수질 및 막여과유속이 막오염 형성에 미치는 영향

  • Kang, Joon-Seok (Department of Environmental Engineering and Energy, Myongji University) ;
  • Park, Seo-Gyeong (Department of Environmental Engineering and Energy, Myongji University) ;
  • Lee, Jeong-Jun (Department of Environmental Engineering and Energy, Myongji University) ;
  • Kim, Han-Seung (Department of Environmental Engineering and Energy, Myongji University)
  • 강준석 (명지대학교 환경에너지공학과) ;
  • 박서경 (명지대학교 환경에너지공학과) ;
  • 이정준 (명지대학교 환경에너지공학과) ;
  • 김한승 (명지대학교 환경에너지공학과)
  • Received : 2018.01.23
  • Accepted : 2018.02.15
  • Published : 2018.04.16
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Abstract

In this study, the effects of operating conditions on the formation of reversible and irreversible fouling were investigated in the filtration using ceramic membrane for water treatment process. The effect of coagulation pretreatment on fouling formation was also evaluated by comparing the performance of membrane filtration both with and without addition of coagulant. A resistance-in-series-model was applied for the analysis of membrane fouling. Total resistance (RT) and internal fouling resistance (Rf) increased in the membrane filtration process without coagulation as membrane flux and feed water concentrations increased. Internal fouling resistance, which was not recovered by physical cleaning, was more than 70% of the total resistance at the range of the membrane flux more than $5m^3/m^2{\cdot}day$. In the combined process with coagulation, the cake layer resistance (Rc) increased to about 30-80% of total resistance. As the cake layer formed by coagulation floc was easily removed by physical cleaning, the recovery rate by physical cleaning was 54~90%. It was confirmed from the results that the combined process was more efficient to recover the filtration performance by physical cleaning due to higher formation ratio of reversible fouling, resulted in the mitigation of the frequency of chemical cleaning.

Keywords

References

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