NOVELTY - A separator includes a stationary elongate liquid permeable screen is disposed within a housing. A cone member is mounted on the shaft of the rotatable screw adjacent a terminal end of a helical blade. A solid member has an aperture for passage of the shaft. A spring urges the cone member toward the terminal end of the helical blade.    USE - For separating comminuted food waste solids from liquids.    ADVANTAGE - The invention enables conservation of water and reduction in solids volume.    DETAILED DESCRIPTION - A separator comprises an elongate housing (40) disposed at a predetermined angle relative to horizontal, a waste inlet, a liquid outlet, and a waste outlet. The inlet and outlets are in flow communication with the interior and exterior of the housing. A stationary elongate liquid permeable screen is disposed within the housing. It has a length axis aligned with the length of the housing. A conduit is in flow communication with the waste inlet and an interior portion of the screen for introducing food waste solids and liquids into the interior of the screen. A cone member is mounted on the shaft of the rotatable screw adjacent a terminal end of the helical blade. It is adjustably positionable between first and second positions of the shaft. A solid member has an aperture for passage of the shaft. It is located within the housing adjacent the terminal end of the helical blade to define an impedance to the passage of food waste solids. The aperture is positioned adjacent the cone member, and spaced apart from the cone member to define a passage between the cone member and the aperture for the travel of food waste solids to the waste outlet. The dimension of the passage corresponds to the position of the cone member on the shaft. A spring is operably associated with the cone member to urge the cone member toward the terminal end of the helical blade.    An INDEPENDENT CLAIM is included for a waste disposal system comprising a sink having a liquid source and a drain, a disposer in flow communication with the drain of the sink for shattering solid materials introduced to the disposer from the sink and yielding a slurry, and a separator in flow communication with an exit end of the disposer for separating liquid and solid components of the slurry from one another.    DESCRIPTION OF DRAWING(S) - The figure shows a diagrammatic view of the waste disposal system.    Separator (20)    Inlet (26)    Liquid outlet (30)    Chute (32)    Support (38)    Housing (40)    Ends (42, 44)    Access port (46)    Lid (48)    Lid latch members (48a, 48b)    Hinges (50)    Mounting member (52)    Spray assemblies (66)