A filtration model of microporous membrane filters in liquids |
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| Authors: | Jae-Keun Lee Benjamin Y H Liu |
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| Affiliation: | 1. Department of Mechanical and Precision Engineering, Research Institute of Mechanical Technology, Pusan National University, 30 Changjeon, Kumjeong, 609-735, Pusan, Korea
2. Particle Technology Laboratory, Mechanical Engineering Department, University of Minnesota, 55455, Minneapolis, MN, U.S.A.
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| Abstract: | A theoretical study on particulate retention by microporous membrane filters during liquid filtration has been investigated. A model to predict particle retention using a multi-layer concept for filter retention by sieving and using flow resistance for cake filtration was developed to predict particle retention as a function of particle diameter and particle loading. Filter efficiency for the 0.45 μm rated membranes predicted 99.95% for the particle diameter of 0.453 μm. Filter efficiency by sieving model decreased with increased particle loading on the filter. After substantial particle loading, filter efficiency was found to increase with increased particle loading due to the combined effect of sieving and cake filtration. Theoretical particle retention modeling showed good agreement with experimental results. |
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