Biogas is a high-energy gas generated through the anaerobic decomposition of biomass, derived from sources including agricultural residues, cattle dung, sugarcane press mud, municipal solid waste and sewage treatment plant waste.
As a renewable energy source, raw biogas is primarily methane (around 60%) and carbon dioxide (around 40%), with trace amounts of hydrogen sulfide. It can be used directly as fuel, or further processed and upgraded by removing the CO2 and H2S — the resulting Compressed Bio-Gas (CBG) contains over 90% methane, giving it an energy profile comparable to natural gas.
How It Works
Raw biogas from anaerobic digestion is first cleaned to remove hydrogen sulfide and moisture, then passed through an upgrading stage that strips out the bulk of the carbon dioxide, concentrating the methane content.
The upgraded gas is compressed to CBG specification — over 90% methane — for use as vehicle fuel or injection into the piped gas network, turning a waste-treatment by-product into a transportable, natural-gas-equivalent fuel.
From Feedstock to Fuel
Feedstock Sources
Agricultural residues, cattle dung, sugarcane press mud, municipal solid waste and sewage treatment plant waste all feed the anaerobic digestion process.
Raw Biogas
~60% methane and ~40% carbon dioxide with trace hydrogen sulfide, usable directly as fuel without further upgrading.
Compressed Bio-Gas (CBG)
Upgraded to over 90% methane by removing CO2 and H2S, giving an energy profile comparable to natural gas.
Why It Matters
Natural-Gas-Equivalent Energy Content
Upgrading to over 90% methane puts CBG’s energy profile on par with natural gas.
Turns Diverse Waste Streams into Fuel
Agricultural, municipal and sewage waste streams all feed the same anaerobic digestion and upgrading process.
Usable as Vehicle Fuel or Piped Gas
Once compressed to specification, CBG is suitable for direct use as vehicle fuel or injection into the gas grid.
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