Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지

Application of DAF Process to Removal of Turbidity, DOC, Algae and PAC from Dae-Chung Lake Source Water

대청호 상수원수 중의 탁도, 유기오염물질, 조류 및 투입분말활성탄 제거를 위한 DAF 공정 응용

왕창근;이승근

  • Published : 20020000
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Abstract

DAF (Dissolved Air Flotation) is an effective alternative process to conventional sedimentation in water containing low-density particles. The water is saturated with compressed air to dissolve the air into the water at high pressure in a saturation tank. Then the water containing dissolved air is released into a floatation tank at a lower pressure, generating micro-bubbles that rise gently through the water and carry the suspended matter to the surface. Removal effeciencies of turbidity, chlorophyll-a, DOC and $UV_{254}$ Abs. by DAF and conventional sedimentation for raw water from Dae-chung Lake were compared. DOC removal efficiency after adding PAC (Powdered Activated Carbon) was also investigated. At low turbidity, the removal efficiency of turbidity, chlorophyll-a, DOC and $UV_{254}$ Abs was 92.4%, 94.4%, 20.2% and 24.9% respectively. It is concluded that the DAF process is feasible for efficient removal of turbidity and algae in Daejeon water treatment plants.

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References

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