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Difference between revisions of "Centrifugation"
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The sedimentation of particles can be explained by Stoke's law. The equation can be used to calculate the velocity of sedimentation based on five parameters: | The sedimentation of particles can be explained by Stoke's law. The equation can be used to calculate the velocity of sedimentation based on five parameters: | ||
[[File:Stokes-equation.jpg|center]] | [[File:Stokes-equation.jpg|center]] | ||
From the Stokes equation five important behaviours of particles can be explained: | From the Stokes equation, five important behaviours of particles can be explained: | ||
#The rate of particle sedimentation is proportional to the particle size | #The rate of particle sedimentation is proportional to the particle size | ||
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=== Basket centrifugation === | === Basket centrifugation === | ||
[[File:HD.16.088 (12523557255).jpg|alt=Picture showing basket centrifuge for the continuous collection of algae in 1966|thumb|Basket centrifuge for the continuous collection of algae in 1966]] | |||
Basket centrifuges are often called centrifugal filters or clarifiers. The basket centrifuge uses centrifugal force to generate a pressure which forces the liquid through the caked solids, the filter cloth, the backing screen, and finally the basket perforations. The filter cloth retains the solid particles inside the rotating basket while the permeating liquid is continuously discharged. | Basket centrifuges are often called centrifugal filters or clarifiers. The basket centrifuge uses centrifugal force to generate a pressure which forces the liquid through the caked solids, the filter cloth, the backing screen, and finally the basket perforations. The filter cloth retains the solid particles inside the rotating basket while the permeating liquid is continuously discharged. | ||