In present time, the global energy production is mostly dependant on the fossil sources of energy (oil, natural gases and coals). Compared to classic fuels, biogas resulted from anaerobe digestion is permanently renewable, because it is obtained of biomass. As a result, the biogas produced through anaerobe digestion will not only improve the energetic balance of one country, but it will bring an important contribution on preserving natural resources and improving the environmental conditions, through reducing emissions with green house effect and reducing the global warming.

The paper wants to reveal some of the advantages of using biogas, the most important being that biogas is a flexible source of energy, suitable for many applications, especially as fuel for vehicles or in the electric piles technologies. In order to be used as fuel for vehicle, biogas must be improved and transformed in bio-methane. The paper also presents a small biogas plant, which can be used by farmers.