Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A Study on Effect of Jet Mixed Separator Combination for Pre-treatment of Ultrafiltration Membrane Filtration Process

UF 막 여과 공정의 효과적인 전처리 공정으로 분류교반고액분리조(噴流攪拌固液分離槽) (Jet Mixed Separator: JMS) 도입 효과에 관한 연구

  • 이상협 (한국과학기술연구원 환경공정연구부 수질환경 및 복원연구센터) ;
  • 장낙용 (특허청 화학생명공학심사국 유전공학과) ;
  • 渡辺義公 (일본 국립북해도대학대학원 공학연구과 도시환경공학전공)
  • Received : 2004.10.01
  • Accepted : 2004.12.21
  • Published : 2005.02.15
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Abstract

In this research, we tried to combine the coagulation/sedimentation process as pre-treatment with UF membrane filtration to reduce the membrane fouling and to improve the permeate water quality. We used the Jet Mixed Separator (JMS) as coagulation/sedimentation process. We observed that the HPC and E.Coli can't be removed through the direct UF memebrane filtation of surface water. The removal efficiency of dissolved organic substances, indicated by E260 and DOC, was 40% and 15%, respectively. However, the removal efficiency of it increased two time as a result of combination of JMS process as coagulation/sedimentation pre-treatment. This was resulted from the formation of high molecular humic micro-floc through JMS process. The accumulation amount of irreversible cake layer which was not removed by backwashing was less than direct UF membrane filtration of surface water. Moreover, the loading rate of fouling induced substances, such as humic substances and suspended substances, on membrane surface decreased drastically through JMS process. As a result, the accumulation amount of irreversible cake on membrane surface was decreased.

Keywords

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