The book "Analysis of a Commercial Thermophilic Biogas Plant" offers a comprehensive examination of the use of biodegradable waste materials, particularly municipal wastewater, as a viable energy source. It presents a mathematical model of a commercial biogas plant concept specifically designed to meet the clean energy demands in urban areas. The analysis includes estimating the plant size for a specific operating cycle and investigates the characteristic features of a nominal biogas plant with a capacity of 1500 m³. The efficiency of the plant's utilization is thoroughly assessed, taking into account factors such as reactor temperature, pH value, substrate concentration, biomass degradation, and the accumulation of substances due to bacterial growth. This specialized book is aimed at professionals and students in the fields of engineering and IT who are engaged with renewable energy and waste management.