The issues of utilization of heat recovery of high-temperature waste gases of thermal-oxidative solid and liquid waste disposal systems using cogeneration gas turbine techniques with reverse order of processes are considered. The article presents technological scheme, calculation method, design characteristics and analysis of energy and environmental efficiency of thermal-oxidative solid and liquid waste disposal systems based on rotating, layer and chamber furnaces using gas turbine techniques with reverse order of processes. The results of the analysis indicate the possibility of additional generation of electric and thermal energy, which will significantly reduce fuel consumption in the replaced thermal power plants and the corresponding negative environmental impacts. The coefficient of heat utilization in the thermal oxidation neutralization system can reach 0.72 – 0.79, the coefficient of efficiency of the system (CEWEP) 1.17 – 1.57. The obtained calculated data can be used in selecting the best available techniques for energy waste disposal using thermal-oxidative neutralization and gas turbine techniques with reverse order of processes.