A unified theory on solid-liquid separation: Filtration, expression, sedimentation, filtration by centrifugal force, and cross flow filtration
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Based upon a new conception that the solid compressive pressure on a cake surface is not null, almost of all solid-liquid separation operations have been re-examined. For cake filtration, the phenomenon caused by the solid compressive pressure on a cake surface is discussed for thin cake. New expression and hindered sed-imentation theories are developed by above new conception using Darcy’s equation. Application of the new conception to centrifugal filtration and tangential filtration is also discussed. Above results lead to the conclusion that cake filtration, expression, hindered sedimentation, centrifugal filtration and tangential filtration can be described with a unified theory, and the main difference between the operations is only the boundary condition of cake.
Key wordsSolid-liquid Separation Cake Cake Filtration Average Specific Resistance Solid Compressive Pressure Expression Hindered Sedimentation Centrifugal Filtration Tangential Filtration
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- McCabe, W. L, Smith, J. C. and Harriott, P., “Unit Operations of Chemical Engineering”, fifth edition, McGraw-Hill Book Co., (1995).Google Scholar
- Shirato, M., Murase T. and Fukaya, S., “Studies on Expression of Slurries under Constant Pressure”,Kagaku Kogaku,31(11), 1125 (1967).Google Scholar
- Shirato, M., Murase T., Iritani, E. and Hayashi, N., “Cake Filtration-A Technique for Evaluating Compression-Permeability Data at Low Compressive Pressure”,Filtration & Separation, September/October, 404 (1983).Google Scholar
- Tiller, F. M., “The Role of Porosity in Filtration: Numerical Methods for Constant Rate and Constant Pressure Filtration Based on Kozeny’s Law”,Chemical Engineering Progress,49(9), 467 (1953).Google Scholar
- Tiller, F. M., “The Role of Porosity in Filtration: PART 2. Analytical Equations for Constant Rate Filtration”,Chemical Engineering Progress,51(6), 282 (1955).Google Scholar
- Tiller, F. M., “Cake Compressibility-Critical Element in Sol-id-liquid Separation”, World Filtration Congress III, 270 (1982).Google Scholar
- Yim, S. S., “A New Method: Filtration-permeation for Filtration Theory and Application”, Vth World Filtration Congress, France, 91 (1990).Google Scholar
- Yim, S. S., “Complete Process of Hindered Sedimentation”,J. Korean Solid Wastes Engineering Society,12(5), 475 (1995).Google Scholar
- Yim, S. S. and Ben Aim, R., “Highly Compressible Cake Filtration: Application to the Filtration of Flocculated Particles”, 4th World Filtration Congress, Belgium, Al (1986).Google Scholar