Biogas is a mixture of methane and carbon dioxide (CH4 55-75%, CO2 25-45%), produced by the bacterial fermentation of organic waste which is then used as fuel. Biomethanization is, therefore, the process used to generate biogas through the anaerobic digestion of organic material.

SPDbiogas is a company which HELIOSOLAR has shares in, it works on the construction of electric energy production plants using biogas, providing comprehensive support in the development of projects, offering solutions for the development of the idea and its viability analysis, as well as managing public aid.