The principle on which the operation of the decanter centrifuge is based is the difference in specific weight of the materials to be separated. Such a machine can be considered as a settling tank that rotates around an axis. In the settling tank, the solid particles, heavier than the liquid, move by gravity towards the bottom and form a sediment (solid phase). In a centrifuge, the solid phases and the liquid part are separated by centrifugal acceleration. In the rotating drum, the solid particles, which have a higher density and are therefore heavier than the liquid, move outwards by means of the centrifugal force. The use of the decanter comes when the content of solids in the suspension to be processed is particularly high. This machine has the advantage of guaranteeing high efficiency at the level of clarification and at the level of water extraction, as well as allowing the separation of liquids with simultaneous removal of solids.