Effect of Coagulation Condition on Coagulation/Ultrafiltration Membrane Process

응집·한외여과 공정에서 응집조건 결정에 관한 연구

  • Moon, Seong-Yong (Water Environment and Remediation Center, Korea Institute of Science and Technology) ;
  • Lee, Sang-Hyup (Water Environment and Remediation Center, Korea Institute of Science and Technology) ;
  • Kim, Seung-Hyun (Department of Civil Engineering, Kyungnam University) ;
  • Moon, Byung-Hyun (Department of Environment Engineering, Changwon University)
  • 문성용 (한국과학기술연구원 수질환경 및 복원연구센터) ;
  • 이상협 (한국과학기술연구원 수질환경 및 복원연구센터) ;
  • 김승현 (경남대학교 토목공학과) ;
  • 문병현 (창원대학교 환경공학과)
  • Received : 2005.03.31
  • Accepted : 2005.05.12
  • Published : 2005.07.30

Abstract

In this research, coagulation was employed as the pretreatment for membrane process. The effective coagulation conditions were decided after the discussion of different coagulant doses and mixing conditions, etc. Raw water was taken from Nakdong River. The best operation occurred when G value was $230s^{-1}$ and the slow mixing lasted around 5 minutes at G value was $23s^{-1}$. To investigate the optimum coagulant dosage, the optimum organics removal was target as organic removal reduces membrane fouling effectively than particle removal. This result indicated that organics are more important causes than turbidity for membrane fouling. However, turbidity becomes an important factor after certain amount of organic matters is removed.

Keywords

References

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