Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Analysis of the Influence of Temperature on the Biogas Yield of Anaerobic Digestion Process in Biogas Plants E.V. OZHOGOVA, E.V. LUBENTSOVA, V.F. LUBENTSOV The effect of temperature stabilization accuracy on biogas yield in an anaerobic digestion process in a biogas plant is analyzed. Accuracy loss was simulated by imposing a noise on the temperature, the optimal value of which was determined using an equation identified using the experimental data using the least-squares method. The studies were conducted under mesophilic and thermophilic temperature conditions of methane digestion under noise of varying intensity. These conditions were chosen because maintaining a given waste digestion temperature in the mesophilic mode requires less energy, while the thermophilic mode results in faster decomposition of organic waste, ensuring a higher and more intense biogas yield. Uneven sensitivity of the process to temperature deviations from the optimal value is demonstrated with increasing noise variance in the measurements, leading to a decrease in the maximum biogas yield in the studied conditions. Assessing the deviation of biogas yield from the maximum allows for determining the optimal accuracy of temperature stabilization. Keywords: biogas plant, mesophilic mode, thermophilic mode, biogas yield, accuracy of fermentation temperature stabilization. DOI: 10.25791/pribor.8.2026.1693 Pp. 01-07.