A method for production of electricity and heat in a process of thermal conversion of different types of wastes in an integrated installation, wherein different types of wastes are segregated to separate wastes destined for thermal disposal (124, 132, 133, 134, 135), which are then processed in at least two mineralisers (139, 140, 141), each having a form of an isolated, longitudinal, rotatable and inclined tube with vanes arranged on its internal walls to scatter the material during the rotation of the tube, with an evaporation zone in which the evaporation of moisture from waste material delivered in batches takes place, and with a mineralisation zone in which a process of gasification of the batch material takes place, and wherein the batch material is transformed into a hot gas and inorganic waste, wherein after that the hot gas, after its purification, is converted into electricity and heat, characterized by: - performing periodic measurements to determine calorific value, moisture content and composition structure of the wastes intended for thermal disposal (124, 132, 133, 134, 135) by using analysers (114, 118, 122, 127, 129,131), - using rotary mineralisers (139, 140, 141) that comprise in the mineralisation zone vanes with adjustable angle of inclination to the longitudinal axis of the mineraliser tube, so that during the operation of mineraliser, for larger inclination angles of vanes the batch material passes faster through the mineralisation zone than for smaller inclination angles of vanes, - by using mixers (136, 137, 138) assigned to the mineralisers (139, 140, 141), the wastes (124, 132, 133, 134, 135) are mixed with each other in proportions dependent on a predetermined amount of chemical energy of the batch material and on the inclination angle of vanes set in the particular mineraliser (139, 140, 141), so that for a mineraliser (139, 140, 141) having a larger inclination angle of vanes a mixture with a higher calorific value is selected than a calorific value of mixture for a mineraliser (139, 140, 141) having a smaller inclination angle of vanes, - wherein the rotational speed of each mineraliser (139, 140, 141) is adjusted according to the moisture content of the mixture provided to the particular mineraliser (139, 140, 141). - performing periodic measurements to determine calorific value, moisture content and composition structure of the wastes intended for thermal disposal (124, 132, 133, 134, 135) by using analysers (114, 118, 122, 127, 129,131), - using rotary mineralisers (139, 140, 141) that comprise in the mineralisation zone vanes with adjustable angle of inclination to the longitudinal axis of the mineraliser tube, so that during the operation of mineraliser, for larger inclination angles of vanes the batch material passes faster through the mineralisation zone than for smaller inclination angles of vanes, - by using mixers (136, 137, 138) assigned to the mineralisers (139, 140, 141), the wastes (124, 132, 133, 134, 135) are mixed with each other in proportions dependent on a predetermined amount of chemical energy of the batch material and on the inclination angle of vanes set in the particular mineraliser (139, 140, 141), so that for a mineraliser (139, 140, 141) having a larger inclination angle of vanes a mixture with a higher calorific value is selected than a calorific value of mixture for a mineraliser (139, 140, 141) having a smaller inclination angle of vanes, - wherein the rotational speed of each mineraliser (139, 140, 141) is adjusted according to the moisture content of the mixture provided to the particular mineraliser (139, 140, 141).