Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effects of Characteristics of Flocculent Aggregates on Membrane Fouling in Microfiltration with Coagulation Pretreatment

전처리로 응집공정을 이용한 정밀여과 공정에서 응집 플록 특성에 따른 막오염 연구

  • 이석헌 (한국과학기술연구원 수질환경 및 복원연구센터) ;
  • 권지향 (건국대학교 공과대학 환경공학과) ;
  • 최양훈 (건국대학교 공과대학 환경공학과) ;
  • 안규홍 (한국과학기술연구원 수질환경 및 복원연구센터)
  • Received : 2004.09.24
  • Accepted : 2004.11.30
  • Published : 2004.12.15
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Abstract

Coagulation has been investigated for pretreatment of low-pressure membrane systems such as microfiltration and ultrafiltration. Coagulation pretreatment can reduce foulants (particles and organic matter) prior to membrane filtration. However, when in-line coagulation or submerged type of filtration is used, flocculent aggregates could act as a foulant depending on concentrations and specific properties of floc. A natural water and three synthetic waters were used to investigate effects of coagulation pretreatment and presence of flocculent aggregates on membrane fouling. Coagulation pretreatment shows that foul ants were effectively removed during coagulation and the formed cake layer on the membrane surface had less resistances compared to raw natural water. In addition, little difference in membrane fouling was found by flocculent aggregates from the natural water. Interestingly, however, the results by three synthetic waters indicated that flocculent aggregates could have adverse effects on membrane fouling in a specific condition.

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References

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