Question

What are the constituents of biogas?

Answer 1

The composition of biogas varies depending upon the origin of the anaerobic digestion process. Landfill gas typically has methane concentrations around 50%. Advanced waste treatment technologies can produce biogas with 55%–75% methane,which for reactors with free liquids can be increased to 80%-90% methane using in-situ gas purification techniques.As produced, biogas contains water vapor. The fractional volume of water vapor is a function of biogas temperature; correction of measured gas volume for water vapor content and thermal expansion is easily done via simple mathematics  which yields the standardized volume of dry biogas.