There are two main applications of centrifugation: separation of immiscible liquids and separation of solids from liquids. Centrifugal force is generated when materials are rotated; the size of the force depends on the radius and speed of rotation and the density of the centrifuged material. In the separation of immiscible liquids, the denser liquid moves to the bowl wall and the lighter liquid is displaced to an inner annulus.The thickness of the layers is determined by the density of the liquids,
the pressuredifference across the layers and the speed of rotation.
Centrifuges are classified into three groups for:
1. separation of immiscible liquids(Liquid–liquid centrifuges)
2. clarification of liquids by removal of small amounts of solids (centrifugal clarifiers)
3. removal of solids (desludging or dewatering centrifuges).
Desludging, decanting or dewatering centrifuges