What is biogas, its properties and applications

Biogas is a gas produced as a byproduct of microbial decomposition of biomass in the absence of air. It consists mainly of methane (45-70%) and carbon dioxide (55-30%) but also contains some impurities like hydrogen sulfide and water vapor, which are removed in a gas conditioning unit. Due to its properties, biogas is close to natural gas (80-98% methane). It also has no color or smell and is lighter than air.

Biogas can be used for burning in boilers and internal combustion engines without enrichment. Most often, biogas is used to generate electric power.

Find out how much biogas is produced out of different substrates

Biogas refers to methane gas. Unlike propane, it does not liquefy at normal temperatures. Biogas is also not suitable for fueling cylinders without enrichment. During freezing and under pressure biogas is stratified into carbon dioxide and methane. An expensive cryogenic technique is required to liquefy methane. Therefore, methane for use as a fuel for automobiles is not liquefied, instead compressed and pumped into cylinders at 200-250 atm.

Biogas can also be cleaned of CO2, adjusted to the properties of natural gas, and fed into the public gas system. Enriched biogas is called biomethane. Typically, such cleaning is carried out by using a water scrubber, membranes or adsorption. After cleaning, drying, odorizing and compressing, the resulting gas does not differ, both in composition and in properties, from natural gas.


Discover the Benefits of Using Biogas

The main properties of biogas (with 60% methane)


kWh electric energy produced by co-generators with gas piston engines per m³ of biogas


kWh thermal energy produced by co-generators with gas piston engines per m³ of biogas


kcal/m³, Calorific value


kg/m³, Biogas density

650 – 750

°C, Burning point

Frequently Asked Questions About Biogas

About Biogas
Can biogas be liquefied and filled into cylinders?
Can biogas be accumulated and stored for a long time?
Is it possible to make petrol out of biogas?

We use advanced biogas technology

Learn more about how a biogas plant works