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Characteristics of coagulants dispersion within In-Line Orifice Mixer  

Lim, Kyeong-Ho (공주대학교 건설환경공학부)
Park, Young-Oh (한국수자원공사)
Park, Dae-Jin (한국수자원공사)
Park, No-Suk (한국수자원공사)
Ko, Tae-Kon (한국수자원공사)
Publication Information
Journal of Korean Society of Water and Wastewater / v.22, no.6, 2008 , pp. 689-696 More about this Journal
Abstract
In a water treatment process a complete and homogeneous dispersion of the coagulants in the raw water could be most important factor. This research was performed to evaluate coagulation performance of the in-line-orifice mixer which was recently introduced as a rapid mixing device. The test was to determine the actual coagulant dispersion distribution on the overall cross-section at a distance of 1.6~3D from the chemical injection point by measuring zeta potential. From the results of zeta potential test, it was shown that the coagulant dispersion within the in-line orifice mixer was occurred very unevenly. The results have confirmed that it is necessary to increase the velocity of coagulants injection or pressurized water rates, in order to reduce nonuniform distribution of chemicals.
Keywords
In-Line mixer; dispersion; potential; streaming current;
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