a method for disposing of waste materials including wastes generated by residential neighborhoods and business districts of a municipal area , by collecting waste materials centrally , sorting out and removing non - combustible materials from the collected wastes , and shredding the combustible materials coarsely . the coarsely shredded materials are then transported , if necessary , to the location of an incinerator or other furnace into which the materials are fed as fuel at a rate controlled in accordance with the requirements of the burner for complete and clean combustion , by feeding the coarsely shredded materials into a further shredder , shredding the materials to a final size , and immediately conveying the reshredded materials into the burner . transportation and measurement of the coarsely shredded materials is thus accomplished with the waste materials at an optimum density for convenient handling and transportation at an economical cost .