a self - contained sewage waste disposal system is provided including a housing structure and a toilet bowl adapted to receive human waste and fluid for diluting the waste , transporting the waste and rinsing the bowl is provided in the housing structure . a removable filter cassette is placed in the housing structure in communication with the toilet bowl . the bowl is adapted to be flushed to dump the contents into the filter cassette and to be subsequently refilled . the coarse and fine particles of solid waste material are separated from the fluid received from the bowl by filter material in the cassette . the solid material is stored in the cassette in a compact manner for subsequent disposal upon removal of the cassette from the housing . a pump and interconnected conduits in the housing transport fluid from the interior of the system to fill the bowl after a flush , to transport filtered fluid from the filter cassette to a position for recirculation , and to transport excess fluid from the interior of the housing to the exterior thereof . the recirculated fluid is sanitized and deodorized in the housing . controls are provided to pass the fluid through the system to facilitate the collection and disposal of sewage waste within the system in a predetermined sequence .