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What is biogas?

A combustible gas created by the decomposition of organic matter such as human waste, animal slurry, fruit and vegetable 
waste, green waste, dairy waste and brewery waste, that is composed primarily of methane (approx.60%) and carbon dioxide
(approx. 40%) plus other trace elements.

The main sources of biogas are from anaerobic digestion, the treatment of sewage sludge and landfill sites.

How much biogas can I get from my waste?

The biogas yield from waste varies greatly dependant on the type and quality of waste, digester technology and the correct
operation of the facility.

What is the energy content of biogas?

Biogas with a methane content of 60% will have an energy content of around 6kWh /m3. If utilised for electric generation,
2kWh of useable electric is produced with the remainder turning into heat energy.

The energy content can be increased considerably by upgrading the biogas to Biomethane, removing the CO2, providing a
gas of suitable quality for injection into the national gas grid or for use as a transport fuel.

Environmental benefits of biogas

Methane has a greenhouse gas (GHG) factor 21 times greater than CO2. Capturing methane from waste, which would
otherwise be emitted to atmosphere, and utilising it for other purposes will obviously reduce the GHG impact.

Biogas energy is considered carbon neutral since carbon emitted by its combustion comes from organic matter that fixed the carbon from atmospheric CO2. Additionally utilising biogas will replace fossil fuels, a main contributor to GHG emissions.