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Preliminary preparation of waste for anaerobic digestion at thermophilic temperature conditions is the most energy-intensive stage of the process of anaerobic bioconversion of production and consumption waste organic matter, therefore, the search for ways to reduce energy consumption at this stage remains an urgent task. The article proposes a technological solution to maintain the temperature regime of the digester operation due to the utilization of existing waste low-grade energy sources using a compression heat pump. The flow diagram of the experimental biogas plant is shown and a description of its operation is given. The dependences of the absolute and specific rates of heating of the influent and cooling of the effluent on the initial temperature of the effluent are given. The principal possibility of maintaining the temperature regime in the digester is shown by using the heat recovery of the effluent using a compression heat pump.

The use of methods for the biological conversion of organic waste with the production of biogas while solving environmental issues from pollution is an urgent task. The aim of this work is the development of intellectualized control system of parameters of anaerobic bioconversion of organic waste liquid, including parameters of heating supply system of a biogas plant with optimization of the combustion process of biogas, while using the method of optimization of the anaerobic bioconversion of organic waste due to the multiple supply substrate to the bioreactor, ensuring the efficiency and stability of anaerobic bioconversion of organic matter. The developed system allows optimizing the process of biogas combustion with obtaining the heat carrier in the required quantity and quality while minimizing emissions of biogas combustion. Maintaining the optimal rate of supply of the daily dose of the substrate in the bioreactor allows to increase the resistance to organic matter overload; to increase resistance to ammonium nitrogen overloads; to reduce pH fluctuations in the bioreactor.