Gas source / feedstock

  • AD process

Typical gas mix

  • CH4 is upgraded to 95-98% with impurities removed
  • O2 less than 1%
  • H2S less than 50ppm

Where does it occur?

  • UK
  • France
  • China
  • Netherlands
  • Sweden
  • Norway
  • Far East in general



what is it for?

  • Biogas >95% CH4 is used as transport fuel or alternative to natural gas for domestic use


did you know?

It is often necessary to regulate gas pressure down to 350mb max. for monitoring using a regulator and pressure relief valve. Many countries have very high standards to biogas to be injected into the grid. Permissible levels of O2 vary.

Biogas monitoring for upgraded biomethane

By working with partners worldwide, Geotech is involved in a range of projects at the cutting edge of biogas production and processing. The latest of these is a landmark deal agreed between Marks & Spencer (M&S) and Future Biogas, a major anaerobic digestion plant operator, for the purchase of biomethane certificates. The deal sees M&S…
Read more

Other applications

Agricultural waste AD (large scale)

Large agricultural processors install AD plant to generate revenue and dispose of biodegradable waste, which is usually a single type.

Farm waste AD (small scale)

Individual farms install AD (anaerobic digestion) plant and use for on-site heating to generate revenue and dispose of farm waste, which may be a mixture of animal and plant waste.

Landfill gas field management

Landfill sites often produce large amounts of methane-rich gas. This should be destroyed to protect against greenhouse gas emissions but the gas is also a valuable fuel.

Gas flaring

Methane is a powerful greenhouse gas and should be destroyed before it enters the atmosphere. Flaring is a common solution for gas with CH4 10%-40%.

Landfill perimeter monitoring

Controlling potentially explosive and asphyxiant gases from escaping off site is important for meeting Health and Safety standards and protecting the local environment.

Mixed food waste AD

Local authorities and waste contractors install AD plants to dispose of mixed organic waste and generate revenue.

Sewage / waste water treatment AD

AD of human waste has been common in many countries for years but increasing energy costs now drive efficiency. Sewage processors are large energy users and AD can offset and help manage this.