Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Adsorption-DAF Hybrid Process for the Simultaneous Removal of Algae and Organic Compounds

조류와 유기화합물의 동시제거를 위한 흡착 - DAF 복합공정

  • 이재욱 (서남대 학교 환경화학공학과) ;
  • 곽동희 (서남대 학교 환경화학공학과) ;
  • 최승필 (서남대 학교 환경화학공학과) ;
  • 정흥조 (서남대 학교 환경화학공학과)
  • Received : 2003.10.04
  • Accepted : 2004.01.26
  • Published : 2004.04.15
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Abstract

Dissolved air flotation (DAF) is an effective solid/liquid separation process for low density floc particles such as algal, color-alum and clay-alum flocs produced from low turbidity water. The removal of taste and odor-causing organics (2-mthylisoboneol and geosmin) originating from algae in drinking water is a local and worldwide concern. Although DAF has been effectively applied for the removal of suspended solid, its application for the treatment of dissolved organic carbon is very limited. In this study, a new hybrid system consisting of adsorption and DAF processes was introduced for the simultaneous removal of algae and taste and odor-causing organics. Powdered activated carbon (PAC) was used as an adsorbent. In this proposed system, the major concern of eliminating the spent PAC from the system was also addressed. It was found that zeta potential of algae and PAC was increased with coagulant dosage, and the removal efficiency in DAF was also enhanced up to 90~95% under the given experimental conditions. Based on this study, the hybrid process was found to be a promising technology for the simultaneous removal of algae and dissolved organic pollutants.

Keywords

References

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