Particle deposition and layer formation at the crossflow microfiltration |
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| Institution: | 1. Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;2. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;3. Se Hong Trading, 42-276, Ihyeon-dong, Seo-gu, Daegu 41754, Republic of Korea;4. College of Medicine, Ewha Womans University and Ewha Medical Research Institute, 911-1, MokDong, YangCheon-Ku, Seoul 07985, Republic of Korea;1. Cell Bench Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea;2. SenPlus, Ltd., Gyenggi-do, Republic of Korea;3. Seoul National University Hospital, Seoul, Republic of Korea;1. University of Johannesburg, Faculty of Science, Department of Applied Chemistry, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa;2. University of Swaziland, Faculty of Science Department of Chemistry, Kwaluseni Campus, Private Bag 4, Kwaluseni M201, Swaziland;3. University of South Africa, Nanotechnology and Water Sustainability Research Unit, College of Engineering, Science and Technology, Florida Science Campus, Roodepoort, South Africa;4. Ghent University, Faculty of Bioscience Engineering, Department of Applied Analytical and Physical Chemistry, Coupure Links 653, B-9000 Ghent, Belgium;1. University of Johannesburg, Faculty of Science Department of Applied Chemistry, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa;2. University of California, Los Angeles Department of Civil and Environmental Engineering, 5732-G Boelter Hall, P.O. Box 951593, Los Angeles, CA 90095-1593, USA;3. University of Gent, Faculty of Bioscience Engineering, Coupure Links 653, B-9000 Ghent, Belgium;4. Delft University of Technology, Faculty of Civil Engineering and Geosciences, Stevinweg 1, 2628CN Delft, The Netherlands |
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| Abstract: | A microscopic model of the layer formation and the cake growth at the crossflow microfiltration will be introduced. The model considers the hydrodynamic, adhesive and friction forces acting on a single particle during the filtration process. It can be shown that mainly the balance between the lift force and the drag force of the filtrate flow determines the layer formation at the membrane. Particle attachment to the layer is mostly an irreversible process. This is due to the large influence of the adhesive forces. The irreversibility of particle attachment was proved by experiments with monodisperse particles. The introduced model allows the prediction of the instationary crossflow filtration processes. The filtration rate and structure of the formed layer can be calculated. In the case of a filtration at constant transmembrane pressure the model calculation shows a good correspondence to the experimental results. |
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