NOVELTY - A plant for treating solid and/or liquid refuse comprises a reactor in which the refuse is subjected to pyrolysis treatment. The refuse is fed to the reactor by a feeder comprising a micro-disintegrator and a pre-gasifier for transforming the liquid refuse into a gaseous phase and the solid refuse into a vapor or gaseous phase prior to their introduction into the reactor.    USE - Used as a plant for treating solid and/or liquid refuse by pyrolysis.    ADVANTAGE - The refuse is completely disintegrated, with the formation of carbon dioxide and hydrogen, with the hydrogen being used for the production of clean electrical energy which can be used to self-sustain the plant, or for other ecological uses, such as motor traction using hydrogen motors, and fuel cells. The plant has acceptable maintenance and operating costs, and has virtually no environmental impact. Treatment of refuse is highly efficient.    DETAILED DESCRIPTION - A plant for treating solid and/or liquid refuse comprises an environment or a reactor (1) in which the refuse is subjected to pyrolysis treatment. The refuse is fed to the reactor by a feeder (2), with a device (19, 40) provided to recover and/or treat the solid, liquid and gaseous products deriving from the refuse pyrolysis treatment, connected to the reactor. The feeder comprises a micro-disintegrator and a pre-gasifier for transforming the liquid refuse into a gaseous phase and the solid refuse into a vapor or gaseous phase prior to their introduction into the reactor, in order that the total mass of refuse is able to undergo thermal pyrolysis with its consequent complete destruction.    An INDEPENDENT CLAIM is included for treating refuse by pyrolysis in a plant, in which the refuse is pre-gasified and micro-disintegrated before being fed to a reactor in which the pyrolysis takes place. The liquid part of the refuse is transformed into a gaseous phase and the micro-disintegrated solid part is fed with high temperature, high pressure steam to liquefy and then evaporate and sublime it before the refuse enters the reactor.    DESCRIPTION OF DRAWING(S) - The figure shows a simplified scheme of the plant.    Reactor (1)    Feeder (2)    Tank (19)    Gas separation line (40)