H2S is an undesirable component in biogas, since it is a corrosive gas capable of damaging the equipment and accessories used in the process to obtain energy. CO2 and humidity can also be considered as impurities because they reduce the calorific value of biogas in direct combustion for thermal power generation [7,8]. Of the many variables that can
automatically change the chemical composition of biogas and its energy content, the origin and quality of the biomass used, the type of biodigester and the management used in the anaerobic digestion process should be mentioned [9,10].