A new method to evaluate polydisperse kaolinite clay particle removal in roughing filtration using colloid filtration theory
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| Title: | A new method to evaluate polydisperse kaolinite clay particle removal in roughing filtration using colloid filtration theory |
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| Authors: | Lin, Edwin, Page, Declan declan.page@csiro.au, Pavelic, Paul1 |
| Source: | Water Research. Feb2008, Vol. 42 Issue 3, p669-676. 8p. |
| Subjects: | Roughing filtration (Water purification), Colloids, Filters & filtration, Linear free energy relationship, Kaolinite, Diffusion in hydrology, Attachment behavior |
| Abstract: | Previous application of colloid filtration theory to roughing filtration has not considered a reliable method for determining a representative attachment factor for a polydisperse suspension (of constant particle density). Establishment of such a method would broaden the application of trajectory modelling in roughing filtration, and progress the development of a comprehensive database of attachment factors and surface charge potentials for various particle and fluid types. This study establishes a methodology for the application of colloid filtration theory to roughing filtration and incorporates recent advancements in theoretical single-collector efficiency. A polydisperse kaolinite clay suspension was passed through a series of four gravel upflow roughing filters and removal efficiencies were calculated. Both the classical and Tufenkji and Elimelech''s more recent correlation equations were used to calculate theoretical single-collector efficiencies and associated attachment factors for three different filter media sizes, flow rates, and suspended solids concentrations (0.137±0.023). The use of Tufenkji and Elimelech''s modified correlation equation resulted in reduced variability in the estimation of theoretical single-collector efficiencies. [Copyright &y& Elsevier] |
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| Database: | Engineering Source |
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