Biogas typically consists of Methane, Carbon Dioxide, Hydrogen Sulphide and Moisture. Out of these constituents only Methane is a useful constituent from the energy content point of view. The typical GCV of normal Biogas is in the range of 4500 to 4800 kCal / m3. Biogas Upgradation can convert this Biogas by removal of hydrogen sulphide and carbon dioxide into BioMethane having calorific value in the range of 7000 to 8000 kcal / m3depending upon the methane content in raw biogas. Biogas Upgradation Technology removes these other not useful constituents of Biogas in Three Stages:

IETL offers complete end-to-end state-of-the-art Biogas Upgradation Systems (Biogas Upscaling System) consisting of the Bioskrubber™ (Biogas Desulphurisation System) and CO₂Skrub™ (Carbon Dioxide Removal system). The Biogas Upgradation System enriches the methane content in the raw biogas upto the quality of Compressed Natural Gas (CNG) to produce BioMethane.

• Hydrogen Sulphide Removal and Biological sulphur recovery through Bioskrubber™ Technology and Catalyst Scrubbing Technology.
• Pressurisation of Incoming Biogas Followed by Cooling.
• CO₂Skrub™ Pressurised Water Scrubber Technology for Carbon Dioxide Removal.
• Bottling and Pumping of Upgraded Biogas (BioMethane) containing greater than 95% Methane Content.

Advantages :

• High methane content of up to 95% in Clean biogas.
• Complete useful energy recovery by Biogas Upgradation.
• The BioMethane (or bio-natural gas) extracted from organic waste can replace fossil-based natural gas.
• The production of BioMethane makes an important contribution to a stable and reliable energy supply.
• Its ability to be injected directly into the existing natural gas grid allows for energy-efficient and cost-effective transport.