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KMID : 1024520110200050639
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Journal of the Environmental Sciences
2011 Volume.20 No. 5 p.639 ~ p.645
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Flotation Efficiency of the DAF Pump System for Mixing and Coagulation Conditions in Raw Drinking Water
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Ahn Kab-Hwan
Lee Chang-Han
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Abstract
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This study found that flotation efficiencies for removing algae and micro particles in raw water were optimized on mixing intensity and time of the mixing and flocculation conditions with a continuous DAF system. It is more efficient for mixing intensity at 23.1 and time at 660 s(Gt value : 15246) to float flocculated floc with the raw water in M water treatment plant. Flotation efficiency was more than about 0.9 when operated pressure and A/S ratio were sustained at 5 and up to 0.056 . The continuous DAF system made by the study could be continuously operated for 20 days and sustained not exceeding 4 NTU with raw water with low turbidity(13.4~9.8 NTU).
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KEYWORD
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DAF, Algae, Coagulation, Flocculation, Drinking water
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