Gas source / feedstock

  • Mixed food waste, eg:
  • Municipal
  • From food processors
  • From retailers (supermarkets)


Typical gas mix

  • CH4 55-75%
  • CO2 25-50%
  • N2 0-10%
  • H2 0-1000ppm
  • H2S 0-10,000ppm
  • NH3 0-500ppm


where does it occur?

  • Europe

geotech’s products used in mixed waste ad:


what is it for?

  • Heat / power on site
  • Electricity generation
  • Waste disposal


did you know?

Gas quality can change quickly with changes in feedstock: seasonal changes – pumpkins at Halloween, turkeys at Christmas!

We have a fantastic diagram which visually takes you through the biogas monitoring process. Take a look!

Biogen Greenfinch Westwood

Beyond keeping the engines running, Westwood’s CHPs have an impressive 99 percent uptime at 41 percent biogas to electricity and useable-heat efficiency. These high rates will make substantially positive profit impact over the several years of investment payback. ¬†Watching the biogas as it comes from the gasholder and travels towards the CHPs and water heating…
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.

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.