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Relationship between Physical Property of Re-agglomerated Floc and Turbulent flow  

Park, No-Suk (한국수자원공사)
Kim, Seong-Su (한국수자원공사)
Kim, Kwan-Youp (한국수자원공사)
Kim, Jong-Oh (강릉원주대학교 토목공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.24, no.1, 2010 , pp. 103-108 More about this Journal
Abstract
Until now, research reports that it is difficult for brokenup floc after coagulation to reaggregate and settling efficiency of reaggregated floc is relatively low have dominated in water treatment process. In contrast, from recent study conducted by the French researcher, because the density of the reaggregated floc was higher than the previous floc, the settling efficiency of reaggregated floc increased. In this study, 15 times wet test were carried out and the removal efficiency of reagrregated floc was considerably increased. Moreover, this result was explained using the turbulent model for the flow occurred around the floc. Consequently, in the case of suitable hydrodynamic condition for the reaggregation, the characteristics of the reaggregated floc was changed into the favorable condition for improvement of settling efficiency. Also, the most important factor for reaggregation of floc was governed by hydrodynamic shear stress.
Keywords
turbulent model; reaggregate floc; physical characteristics; turbulent diffusion;
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