The book deals with modern problems solved in the field of automation, mathematical modeling, and information systems, in complexes using renewable energy sources such as biogas. In today’s conditions, the use of renewable energy sources such as biogas is very important, since the resources of natural gas, oil and coal are not endless. The biogas plants functioning can provide not only environmentally friendly fuel, but also fertilizers from organic waste. In certain cases, in the production process, this is the best solution that allows reducing the cost of manufactured products, increasing the efficiency of biogas plants. As a result, the enterprise gets the opportunity to gain some energy independence by installing cogeneration equipment that will convert gas into energy, providing it with production. Recommendations are given on the use of software Simba # Biogas for automated information processing.The book is intended for students, undergraduates, doctoral students involved in the development of information and software systems and the creation of models of mathematical support for information and automated systems, as well as the design of automated devices.