NOVELTY - A thermolysis method for industrial and/or domestic waste, involving at least one drying stage followed by a thermolysis stage and a stage for combustion of the gas formed in the thermolysis to produce flue gas which is partially used in the thermolysis, additionally includes a stage for regulating (specifically reducing or increasing) the temperature of the flue gas.    USE - For thermolysis of domestic or industrial waste (e.g. domestic garbage, car crushing residues, used tires, noxious industrial waste or green waste), to produce a combustible gas and a combustible solid (both of which are useful as energy source).    ADVANTAGE - The temperature of the hot flue gas is adjusted (specifically to give a constant value despite differing calorific values of the fuel used) without the need to adjust the fuel and waste flow rates.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a corresponding plant for thermolysis of industrial and/or domestic waste, having at least one dryer (1), a waste thermolysis furnace (2), a generator (3) for flue gases (to be at least partially used in the dryer) and a heat exchanger (4), the novel feature being that the plant additionally includes a regulator for the temperature of the hot flue gas.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of a waste thermolysis plant.    Rotary dryer (1)    Rotating tube, as thermolysis system (2)    Combustion chamber, as combustion gas generator (3)    Heat exchanger (4)    Second thermolysis tube (5)    Boiler (7)    Flue gas treatment system (8, 9)    Ground waste material (10)    Outlet cell (11)    Transporter (12)    Cyclone (13)    Ventilator (14)    Gas-solid separator (21)    Combustion gas circulation lines (32', 33, 52, 72)    Air circulation line (43)    Denitrification system (91)    Injector (92)    Dry waste outlet line (111)    Moist air outlet line (112)    Ventilator inlet line (131)    Ventilator outlet line (141)    Separator outlet line (211)    Thermolysis gas outlet line (212)