대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제36권4호
  • /
  • Pages.251-257
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  • 2014
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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저탁도 해수원수 특성에 적합한 응집 - 여과 공정의 최적화

Optimization of Coagulation and Media Filtration Process for Low Turbidity Seawater

  • 손동민 (부경대학교 환경공학과) ;
  • 조명흠 (부경대학교 환경공학과) ;
  • 김정숙 (동서대학교 에너지환경공학과) ;
  • 강임석 (부경대학교 환경공학과)
  • Son, Dong-Min (Department of Environmental Engineering, Pukyong National University) ;
  • Jo, Myeong-Heum (Department of Environmental Engineering, Pukyong National University) ;
  • Kim, Jeong-Sook (Department of Energy&Environmental Engineering, Dongseo University) ;
  • Kang, Lim-Seok (Department of Environmental Engineering, Pukyong National University)
  • 투고 : 2013.07.04
  • 심사 : 2014.04.02
  • 발행 : 2014.04.30
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초록

본 연구는 RO 해수담수화 전처리 공정으로써 응집 및 여과공정에 대하여 수행되었다. RO 시스템은 충분하고 안정적인 전처리를 통하여 RO 막오염을 완화 할 수 있는 우수한 수질을 공급할 수 있어야 한다. 본 실험은 RO 막 공정의 전처리로서 다양한 응집제 주입량, 응집 교반 강도 및 시간, 탁도, 여과속도 실험 조건을 사용하여 응집과 여과공정의 효과를 조사하기 위하여 수행되었다. 본 연구 결과 적합한 RO 공급수로 적절한 SDI 값을 나타내기 위한 최적 전처리 조건은 응집 pH 6.5, 탁도 4 NTU 이상 그리고 여재 충진 높이가 550 mm 이상인 것으로 나타났다. 그러나 응집교반 강도, 응집제 주입농도와 여과속도는 여과효율에 비교적 큰 영향을 미치지 않은 것으로 나타났다.

This research is focused on coagulation and sand filtration process as a pretreatment of RO seawater desalination. RO systems require sufficient and reliable pretreatment process to produce superior quality of RO feedwater that can mitigate RO membrane fouling. This experiment was conducted to investigate the effectiveness of coagulation and filtration process under various experimental conditions including different coagulant dose, flocculation mixing intensity and time, turbidity, and filtration rate. The experimental results showed that the optimum pretreatment conditions resulting in lower SDI value suitable for RO feedwater were coagulation pH 6.5, raw water turbidity greater than 4 NTU, and media bed depth greater than 550 mm. However, flocculation mixing intensity, coagulant dose, and filtration rate relatively affected little on the filtration efficiency.

키워드

참고문헌

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