An apparatus for the treatment of organic matter with worms, includes a receptacle with a side wall at least a portion of which is downwardly tapering to facilitate compression of organic matter as organic matter is processed, an upper entry aperture for loading the receptacle with the organic matter and worms, a lower discharge aperture for discharging compressed material including castings and organic matter, and a base lid adapted to releasably close the discharge aperture and to permit removal of the compressed material from the receptacle.
