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[References: 35 tit.]

This study presents results for comprehensive estimation of the characteristics of combustion of coal sludge based fuels with the addition of (5% wt.) waste turbine oil and wood biomass using the multiple-criteria analysis method. The results of experimental studies of fuel ignition and combustion, data on the calorific value, ash content, cost, composition of flue gases are used. The mixtures are burned in the form of pellets, beds, and droplets of an aqueous suspension. It is revealed that the use of additives positively affects the energy, environmental, and complex efficiency indexes of coal sludge combustion. The group of fuels burned in the form of pellets is characterized by minimum energy, environmental, and complex efficiency indexes. The greatest environmental potential is determined was found in fuels burned in the form of droplets of aqueous suspensions. The results of the study confirm the prospects for energy utilization of a wide range of wastes of coal, oil, and vegetable origin as part of mixed fuels.