Theory of batchwise centrifugal filtration

✍ Scribed by Masao Sambuichi; Hideo Nakakura; Kunihisa Osasa; F. M. Tiller

• Publisher: American Institute of Chemical Engineers
• Year: 1987
• Tongue: English
• Weight: 982 KB
• Volume: 33
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690330113

✦ Synopsis

Theory of Batchwise Centrifugal Filtration

In centrifugal filtration, centrifugal forces serve as the driving force in the production of cakes. Centrifugal sedimentation leads to formation of a clear supernatant followed by a slurry and a cake that grows and compacts simultaneously. The slurry concentration is independent of radius but decreases everywhere within the suspension at the same rate with respect to time. The theoretical analysis of centrifugal filtration presented here takes cake compressibility and variable permeability into account. Experiments were carried out under low driving forces with a centrifuge having a diameter of 150 rnrn and speeds of 1,000-2,000 RPM. With centrifugal accelerations of 75-300 g and pressure differentials under 1 atm, the sedimentation process was relatively slow and could be observed experimentally with ease.