A disc assembly with a substantially rigid disc core includes a first section removably attached to a second section and mounted to a disc screen shaft. The disc core includes a transport surface extending between a left side of the disc core and a right side of the disc core, and a replaceable coating of textured wear material is deposited along the transport surface.

A filter sector for a filter disc or a disc filter with a perforated and structured filter plate, wherein the filter plate can be suctioned. The filter plate comprises at least one arch structure with a polygonal base. An improvement in the separation capacity or separation efficiency is made possible.

A disc assembly with a substantially rigid disc core includes a first section removably attached to a second section and mounted to a disc screen shaft. The disc core includes a transport surface extending between a left side of the disc core and a right side of the disc core, and a replaceable coating of textured wear material is deposited along the transport surface.