A description is given of a method for the use of waste, particularly municipal solid waste, in a thermoelectric power plant (100) in which the primary energy is supplied by the combustion of fossil fuels with the supply of comburent air, wherein waste is combusted in a combustion reactor (1') with appropriately controlled air flow rate, cooling and purification of the flue gases, mixing of said purified flue gases with the comburent air used in said plant, and wherein pressurised steam is produced by said reactor for waste combustion and said pressurised steam is sent directly to the cylindrical body (124) of the boiler (101) of said power plant (100), with resulting reduction in recycling of the condensates from the turbine to the boiler.
A plant for implementing this method is also described.