Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effect of Coagulation in Coagulation/Ultrafiltration Hybrid System in Water Treatment Process

정수처리용 응집.한외여과 혼성공정에서 응집 효과에 관한 연구

  • Moon, Seong-Yong (Water Environment and Remediation Center, Korea Institute of Science and Technology) ;
  • Lee, Sang-Hyub (Water Environment and Remediation Center, Korea Institute of Science and Technology) ;
  • Kim, Seung-Hyun (Department of Civil Engineering, Kyungnam University) ;
  • Yoon, Cho-Hee (Energy & Chemical Engineering, Kyungnam University)
  • 문성용 (한국과학기술연구원 수질환경및복원연구센터) ;
  • 이상협 (한국과학기술연구원 수질환경및복원연구센터) ;
  • 김승현 (경남대학교 토목공학과) ;
  • 윤조희 (경남대학교 에너지화학공학부)
  • Published : 2005.08.31
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Abstract

Coagulation influence was evaluated as the pretreatment for ultrafiltration. Coagulation was expected to improve water quality, reduce membrane fouling and increase backwash effect. Continuous operation of UF was employed in order to investigate the influence of coagulation. Alum, PACS and Ferric chloride were used as coagulants separately. From the result of the research, coagulation can improve the treated water quality greatly. Organic removal was increased more than turbidity and showed an improvement of 30.6% at most. All three coagulants presented conspicuous reduction of membrane fouling, among which PACS was the most effective with long term run. Backwash effect differed with different coagulants while Ferric chloride turned out to be the most effective one. The optimum dosage of coagulant resulted in the highest backwash efficiency.

한외여과 공정의 전처리 공정으로 응집을 적용하였으며, 막여과 공정에 미치는 응집공정의 영향을 평가하였다. 예상되는 응집 효과는 수질 개선, 막오염 저감 및 역세척 효율 향상 등이며, 응집 한외여과 막여과 공정을 연속운전을 통해 조사하였다. 이때 적용된 응집제는 황산반토, PACS, 염화제2철이다. 연구 결과 응집을 통해 처리수 수질을 크게 향상 시킬 수 있었으며, 현탁물질 보다는 유기물 제거율에 높은 효과가 있었고, 최대 30.6%의 제거율 향상을 나타내었다. 막오염 저감에 있어서는 세 종류의 응집제 모두 뚜렷한 효과를 관찰할 수 있었으며, 특히 장기운전에 TA어서 PACS가 가장 효과적이었다. 역세척 효율은 철염응집제가 가장 효과적이었으며, 적정 응집제 주입량에 가까울수록 효율이 향상되는 것으로 나타났다.

Keywords

References

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