Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Cause of Filtrate Deterioration and Its Improvement in Rapid Filtration

급속여과공정에서 여과수질 저하원인 및 개선방안

  • 김진근 (한국수자원공사 수도관리처) ;
  • 이송희 (한국수자원공사 수도관리처) ;
  • 김재원 (한국수자원공사 수도관리처)
  • Received : 2010.04.26
  • Accepted : 2010.06.10
  • Published : 2010.06.15
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Abstract

Particle removal is an important step taken at water treatment plants (WTPs) for the safety of tap water due to its proportionality to the pathogen inactivation. Government promulgated a treatment technique for the optimization of filtration including continuous turbidity monitoring using on-line turbidimeters. Based on the turbidity measurements of 460 filters at 31 WTPs operated by K-water, the evaluation of filtration performance and the investigation of major causes related to particle breakthrough were explored. 98.1 % of the filters had an effluent turbidity measurement which was less than 0.1 NTU, but turbidity breakthrough of more than 0.3 NTU was noticed occasionally which is in violation of AWWA 5-Star guidelines. It was shown that the optimization of coagulation, filter-to-waste, the observance of optimal filtration velocity and backwashing process based on filtrate turbidity were crucial for the improvement of filtrate.

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References

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