The invention relates to a solid bowl centrifuge with a horizontal elongated, hollow, rotatable, solid-wall bowl (2) with an inlet and an outlet and a rotatable screw conveyor with a shaft (6) and helical screw (7) rotatable mounted inside said bowl and extending substantially the full length thereof. It is mainly characterized in that on the shaft there are mounted a number of truncated conical discs (24), whereby the discs are directly surrounded by the helical screw. With such design the decanter capacity can be increased and the polymer consumption reduced. Further power consumption can be reduced by obtaining the same performances as the traditional decanter at lower rotational speed (lower g-force).

An apparatus for the separation of solid component, heavy and light density liquid components of a slurry, comprising a decanter section comprising a screw conveyor enclosed by a decanter house and a centrifuge section comprising a disc centrifuge. The centrifuge section is enclosed by a centrifuge house, the decanter section and centrifuge section are separated by an intersection comprising a stationary impeller for transmitting liquid from the decanter section to the centrifuge section. The screw conveyor, decanter house and centrifuge house are rotatable around a central axial shaft. The decanter section an axially arranged inlet and a solid material outlet, the centrifuge section comprises an axially central first liquid outlet for lighter liquid and second liquid outlets for heavier liquid. The second liquid outlets can be arranged on an end plate of the centrifuge house, with the radial distance of the second outlets from the central axis being adjustable.

A centrifugal separator for separating solid particles from a liquid mixture includes a rotor body. The rotor body has a separation chamber with an inlet for the liquid mixture, one or more liquid outlets for a liquid separated from the liquid mixture, a sludge outlet for the separated solid particles, a screw conveyor adapted to rotate in the rotor body, at a speed differing from the rotational speed of the rotor body, for transporting the separated solid particles in the separation chamber towards and out of the sludge outlet, a drive arrangement adapted to rotate the rotor body and the screw conveyor at their respective speeds, and a control unit which is adapted to control the drive arrangement to rotate the rotor body at a first speed during a separation phase and at a second speed, which is lower than the first speed, during a particle discharge phase.

A separator disk package for a rotatable drum of a centrifuge for processing of a fluid product in continuous operation is disclosed. The separator disk package includes axially stacked conical separator disks, where, between adjacent separator disks, disk gaps are respectively formed. On one or more of the axially adjacent separator disks are one or more labyrinth-like flow channels, in which, during operation, a direction of flow of a through-flowing product, which is to be clarified of solids, changes on two or more occasions through respectively at least 120.