A method and apparatus for biologically treating refuse or thickened sludge to form compost utilizes a vertical cylindrical chamber havng an upper inlet aperture and a lower outlet aperture. An axial shaft located within the chamber has mounted thereon a plurality of radial arms each having a plurality...http://www.google.es/patents/US3960537?utm_source=gb-gplus-sharePatente US3960537 - Method of processing refuse and/or sludge and a plant for carrying out the method
Method of processing refuse and/or sludge and a plant for carrying out the ...
