Biogas Composition

The minute anaerobic digestion starts and biogas production begins on a technical scale chemical proposition of the substrates involved, are the starting point for the later biogas composition.


Below a possible composition is listed, giving a range of percentages, derived from empirical data:


Methane (CH4) 40-75% 

Carbon dioxide (CO2) 25-55% 

Hydrogen sulfide (H2S) 50-5000ppm 

Ammonia (NH3) 0-1% 

Water (H2O) 0-10% 

Nitrogen (N2) 0-5% 

Oxygen (O2) 0-2% 

Hydrogen (H2) 0-1%


Biogas composition is substrate depending and can be described with the formula developed by Buswell and Boyle.