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This article considers several aspects of creating a combined bioreactor heating system without the use of external power grid power sources. It's known to intensify anaerobic digestion of organic waste, the bioreactor temperature is maintained within a specified range. A bioreactor heating system based on a "water jacket" , that heated by combustion of coal-water fuel has been developed. A technology for preparing and burning coal-water fuel using a radial circulation injection device is offered. Calculations are performed to determine the optimal temperature regime for the combustion process. The results obtained can contribute to the optimization of waste management technologies and ensure environmental sustainability by reducing carbon dioxide emissions and waste accumulation.