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Optimization of In-line Coagulation/MF Process Using On-line Streaming Potential Measurement  

Oh, Jeong-Ik (한국과학기술연구원 수질환경및복원연구센터)
Lee, Seockheon (한국과학기술연구원 수질환경및복원연구센터)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.4, 2004 , pp. 522-528 More about this Journal
Abstract
Microfiltration with in-line rapid coagulation for drinking water production was examined. The in-line rapid coagulation was conducted using newly developed mixing device instantaneous flash mixer. The flux decline during membrane filtration was monitored with coagulant dosage varied. Flux decline was minimized at 1.1mg/L of coagulant dosage, where streaming potential of coagulated water was near zero. The optimum dosage for the process control was explained by dimensionless distance (${\kappa}{\times}a$) of particle pairs, obtained from electrophoresis parameter describing electrostatic repulsion relative to Van der Waals energy between particle pairs in the pre-coagulated water.
Keywords
in-line coagulation; streaming potential; membrane filtration; optimization;
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