A combined chamber and membrane filter plate includes a plate body, a plate edge being thicker than the plate body, projecting beyond the plate body and framing the plate body, a chamber side configured to form a filter chamber and a membrane side having a membrane adapted to and spaced from the plate body. The plate body has a plate surface facing the membrane and a multiplicity of parallel recesses implemented as grooves in the plate surface. The grooves decrease the thickness of the plate body and are configured to form a fluted plate surface.