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Calculation of collision efficiency factor by trajectory analysis in dissolved air flotation
In order to calculate the collision efficiency factor of bubble and particle (αbp), trajectory analysis is performed. The formulation and equations are adopted from the trajectory analysis developed to calculate the collision efficiency factor in differential sedimentation (αos). The most recently developed hydrodynamic equation and interparticle force based on DLVO theory are included. The effect of each governing parameter is calculated. Although the inclusion of electric repulsion as a function of surface charge of particle and ionic strength of suspension is possible, only hydrodynamic and attraction forces are considered in this research to simulate the case when the bubble-particle system is destabilized. The collision efficiency factor of bubble and particle (αbp) is found to be functions of bubble diameter, particle diameter, Hamaker constant, and particle density. The result ofαbp shows similar trend with publishedαDs and experimental results.αbp increases as bubble size decreases at constant size ratio, as particle size ratio approaches unity and as Hamaker constant increases. There is only a slight effect of particle density onαbp.
Calculation of collision efficiency factor by trajectory analysis in dissolved air flotation
In order to calculate the collision efficiency factor of bubble and particle (αbp), trajectory analysis is performed. The formulation and equations are adopted from the trajectory analysis developed to calculate the collision efficiency factor in differential sedimentation (αos). The most recently developed hydrodynamic equation and interparticle force based on DLVO theory are included. The effect of each governing parameter is calculated. Although the inclusion of electric repulsion as a function of surface charge of particle and ionic strength of suspension is possible, only hydrodynamic and attraction forces are considered in this research to simulate the case when the bubble-particle system is destabilized. The collision efficiency factor of bubble and particle (αbp) is found to be functions of bubble diameter, particle diameter, Hamaker constant, and particle density. The result ofαbp shows similar trend with publishedαDs and experimental results.αbp increases as bubble size decreases at constant size ratio, as particle size ratio approaches unity and as Hamaker constant increases. There is only a slight effect of particle density onαbp.
Calculation of collision efficiency factor by trajectory analysis in dissolved air flotation
KSCE J Civ Eng
Han, Mooyoung (author) / Dockko, Seok (author) / Park, Chunghyun (author)
KSCE Journal of Civil Engineering ; 2 ; 91-95
1998-03-01
5 pages
Article (Journal)
Electronic Resource
English
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