Urban biogas plants

Compact biogas system

This biogas plant uses two tanks with volumes of typically around 0.75 to 1 m3 and the household needs a space that is about 2 m2 and 2.5 m high.
This biogas system is a small compact biogas digester that uses starchy or sugary wastes as feedstock, including waste flour, vegetable residues, waste food, fruit peelings, rotten fruit, oil, cake, rhizomes of banana and non-edible seeds. Just 2 kg of such feedstock produces about 500 g methane and the reaction is completed with 24 hours.
This plant is sufficiently compact to be used by urban households, but could also be used in rural areas. This plant could be placed on the roof of urban households and should be set up in a sunny place. If you want to use the biogas for the kitchen you could set the biogas plant close to kitchen, so a short pipe can take the biogas to the kitchen.

Technical specifications

  • Airtight tank
  • Starchy or sugary organic waste (feedstock, waste food etc.) can be used
  • Digestion takes only 1-2 days compared with 30 to 40 days for a manure- based biogas plant
  • Each plant is made from two adapted plastic water tanks, with pipes to add waste food (feedstock)
  • Two tanks with a volume of 0.75 to 1 m3
  • Liquid effluent can be used as fertilizer.