Currently in Poland the most widely used material for the production of electricity is fossil fuels. However, due to an increase in their prices and the tightening of European Union regulations on emissions of greenhouse gases, there are tendencies to transform the energy sector through the implementation of technologies based on alternative source of energy. The main focus is, therefore, on renewable energy source. In recent years, Poland has increased interest in the investments in renewable energy sources to fulfill the guidelines of the EU energy policy, which obliges Poland to obtain a 15% share of renewable energy sources in final energy consumption by 2020. One of the preferred state policy activities related to the production of energy from renewable sources is biogas production and cogeneration of electricity