NOVELTY - The installation comprises selection units for waste treatment, a mill for retained wastes, a unit in the form of pellets for compressing retained wastes, a unit for recovering the heat generated by the compression, and a unit for drying the wastes before compression using the recovered heat. Each selection unit is capable of separating the wastes into a portion removed by the selection unit and a retained portion to be treated by a treatment unit. The compression unit is a press having a flat die comprising a series of extrusion holes. Each extrusion hole has a cylindrical portion.    USE - The installation is useful for manufacturing solid fuel from domestic wastes to be treated (claimed), where the wastes further include food wastes, and wastes produced from shops, industries or management, and the solid fuel is useful in domestic and industrial boilers and incinerators for combustion.    ADVANTAGE - The installation provides efficient, easy and rapid manufacture of solid fuel from domestic wastes with less consumption of energy, allows safe transportation of wastes thus avoiding environmental pollution, and does not require frequent cleaning and maintenance.    DETAILED DESCRIPTION - The installation comprises selection units for waste treatment, a mill for retained wastes, a unit in the form of pellets for compressing retained wastes, a unit for recovering the heat generated by the compression, and a unit for drying the wastes before compression using the recovered heat. Each selection unit is capable of separating the wastes into a portion removed by the selection unit and a retained portion to be treated by a treatment unit. The compression unit is a press having a flat die comprising a series of extrusion holes. Each extrusion hole has a cylindrical portion with a diameter of 7-10 mm, a conical upstream portion and a downstream flared portion. The selection unit is an aeraulic device for sorting wastes; a device for extracting ferrous metals and/or non-ferrous metals; and a device for extracting fine particles and a portion of wastes having dimension of less than 80 mm. A winnowing machine with a blower is arranged in the installation so that air flow is opposed to the flow of the wastes. A unit is arranged in upstream of the aeraulic sorting unit for disintegrating the wastes to obtain waste particles of size less than 500 mm. The selection unit is placed in downstream of the disintegrating unit and/or in upstream of the aeraulic sorting unit. The mill is able to obtain a particle size of less than 50 mm, and located in downstream of the aeraulic sorting unit and/or in upstream of the drying unit. The fine particles extraction device is arranged in downstream of the disintegrating unit and upstream of the mill. INDEPENDENT CLAIMS are included for:    (1) a process for manufacturing solid fuel from wastes; and    (2) a solid fuel obtained from domestic wastes.    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart for the treatment of wastes.    Disintegrating and calibrating the wastes (2)    Separating the wastes into fine particles (3)    Extracting the ferrous metals (4)    Extracting the non-ferrous metals (5)    Extracting the aeraulic portion. (6)