NOVELTY - A fuel is produced by providing a feed of waste to a treatment zone, condensing and recovering vaporized liquids, removing a portion of the recovered liquids as liquid fuel, combining char and the remainder of the recovered liquids, combining feed slurry with additional wastes, subjecting to attrition, and recovering the fuel slurry.    USE - Used for the production of a fuel for use in combustion equipment.    ADVANTAGE - The process provides the possibility to treat all waste including municipal and industrial solid wastes and liquid wastes to form a consistent liquid flowable fuel or fuel supplement using a small amount of energy and employing known system components. The resulting product material is usable as a fuel or a fuel supplement in existing combustion equipment without requiring any modification. This product retains all of the caloric content of the original waste material from which it is formed. The process can be carried out with the expenditure of little energy so that the net result of the process is an energy gain in the form of caloric fuel. It does not involve pyrolysis, decomposition or chemical conversion and thus does not generate pollution control problems. It can be carried out in available system components and can be readily adapted to conditions prevailing within a given area to form a fuel product best suited for the area in which it is produced or to be used. A unique fuel or fuel supplement is produced. A fuel or fuel supplement may be stored and handled without under going decomposition.    DETAILED DESCRIPTION - The production of a fuel from a waste comprises providing a feed of waste containing solids and liquids to a treatment zone under conditions of temperature to produce a solid char and vaporize liquids; condensing and recovering the vaporized liquids; removing a portion of the recovered liquids as liquid fuel; combining the char and the remainder of the recovered liquids to form a feed slurry containing solids; combining the feed slurry with additional wastes comprising combustible liquids; subjecting the feed slurry and additional wastes to conditions of attrition in an attrition zone to produce a product slurry containing solids of fuel size of less than 0.2 mm; and recovering the fuel slurry as a fuel product.