CBG or Compressed Bio Gas consist of mainly methane (more than 90%) and other gasses like carbon dioxide (less than 4%), etc. CBG is produced by anaerobic digestion of biomass and waste sources like agricultural residue, cattle dung, sugarcane press mud, municipal solid waste, sewage treatment plant waste, etc. This Biogas can be purified to remove hydrogen sulphide (H2S), carbon dioxide (CO2), water vapor and when this purified biogas (methane content more than 90%) is compressed to maximum 250 bar and filled up in cascades (group of high pressure cyllinderical vessels) it is called Compressed Bio Gas or CBG.

CBG has properties almost similar to CNG and hence a vehicle running on CNG can straightway be filled with CBG without any modification in the vehicle. Ministry of Road Transport and Highways, Government of India, vide Gazette Notification no. 395 dated 16.6.2015 has permitted usage of CBG for motor vehicles as an alternate of CNG. BIS has issued IS 16087 2016 standards on CBG which is similar to BIS specifications IS 15958:2012 for CNG.

Reserve Bank of India has notified inclusion of CBG projects under Priority Sector Lending vide directives to Banks dated 4.9.2020. Inclusion of Bio-manure produced from CBG Plants under Fertilizer Control Order 1985 has been approved and notified vide Gazette Notification dated 14.7.2020. Ministry of New and Renewable Energy has extended Central Financial Assistance (CFA) Scheme on CBG State Bank of India and Bank of Baroda have launched products for financing of CBG Plants

Inclusion of Digested Bio Gas Slurry is under consideration by Central Fertilizer Committee. Single window facility for approvals. Biomass supply chain by State Governments.

As per the Commercial Agreement on CBG, in the event that Buyer (Oil & Gas Company) is not able to off-take the additional quantities of CBG through its retail outlet(s) or facilitate CBG sale to any industrial bulk customers, the Seller shall have complete liberty to supply / sell CBG to any other person(s) or any companies, entity, etc at its sole discretion.

The type of feedstock to be used for CBG production and financial viability of a plant depends on many factors like cost of input feedstock, location of plant, etc. As per SATAT scheme, the responsibility of setting up of CBG plant lies with the entrepreneur and therefore applicant is requested to assess CBG production and financial viability of its plant by itself. The following tentative yield of various feedstocks are normally considered as per discussion with various existing and proposed CBG Plants and various technology providers. However these are only directional in nature and actual yield may vary substantially depending on quality of feed stock.

Following major approvals are required.However the list are not exhaustive and State / district Authorities may be approached for further clearances required (if any)