Renewable natural gas (RNG)

For a greener, stronger Ontario

Renewable natural gas (RNG), also known as biomethane, is derived from biogas created through anaerobic digesters or through naturally occurring gas in landfill sites. Both biogas and landfill gas (both generally comprised of 55 – 60 per cent methane and 40 – 45 per cent CO2) can be refined using commercially available technology. The end product, RNG, can be injected into the natural gas pipeline system.

Communities that have landfills flaring their gas, or have waste management opportunities to support anaerobic digesters (source-separated organics, breweries, food and beverage plants, food processing companies, waste water treatment plants, etc.) can investigate producing RNG. Agricultural communities can support on-farm biogas-to RNG production using manure and crop residue combined with off-farm wastes such as fats, oil and grease.

As well, communities that build digesters or have landfill gas can blend RNG with compressed natural gas (CNG). By using this blend for transportation, harmful emissions can be effectively lowered.

As long as all gas quality standards are met, RNG producers can connect to Union Gas' pipeline where takeaway capacity is available. Two options are currently available for RNG producers to sell or market their gas through Union Gas. An RNG Producers Handbook is available from Union Gas that details these options, gas quality standards and pipeline connection guidelines. In addition, for those looking to explore the potential of RNG through the community energy plan (CEP) process, there is an excellent publication from the Biogas Association entitled A Developers Guide to Biomethane. Visit to find more information.

Visit our RNG website or contact Union Gas for more information on RNG.
Renewable Natural Gas