Abstract: The invention relates to a semi-submergeable rotary screen for separating liquids and solids, in international class B01D 33/38. A substantially horizontal rotary screen comprises a drum formed of a plurality of spaced-apart circumferential wedge-wires and longitudinal supporting members, the supporting members being spaced longitudinally around the circumference of the drum separated by a distance of not less than 75 mm between adjacent supporting members. The circumferential wires are novel on a submerged screen and do not become blocked by fibres and neither will the longitudinal supporting members lead to blockages if sufficiently spaced. The supporting members may be fixed to the base sides of the wedge wires on the inside of the screen drum and preferably have a thickness measured radially of the drum of not less than 15 mm. Usual applications are for industrial waste recovery or separation.

Abstract: An apparatus for the separation of solids and liquids from a suspension has a hollow drum rotatably mounted about a horizontal axis. The drum wall is a screen made of a plurality of wires, preferably wedge-sectioned wires; spaced apart in a parallel arrangement and lying axially along the drum. Inlet means direct the suspension against the inner surface of the wall at an angle less than right angles, and preferably substantially tangentially to the inner surface, in a direction opposing the rotation of the drum. The separated solids remain within the drum and are extracted therefrom by suitable means.