Energy from agricultural residues

Agricultural by-products are an abundant energy resource that is not always valued today. This is mainly cereal straw but also numerous byproducts such as corn cob, oil cakes, grape cake…

Rafles de maïs - Co-produit de la récolte du maïs valorisable par gazéification
Agrocombustibles valorisables dans un brûleur à gazéification COGEBIO® (sous forme de palets)

Agricultural residues have a comparable calorific value than wood (for the same humidity. Nevertheless, they are generally characterized by higher levels of nitrogen, chlorine and ash. During conventional combustion of these by-products, for example in a grid boiler, high levels is observed in pollutants in the flue gases (nitrogen oxides, hydrochloric acid and particles). There is also slag formations that are the cause of malfunctions and high maintenance costs.

The COGEBIO® process is particularly suitable for these fuels because it avoids direct combustion and related high temperatures. It is a technology that does not promote clinker formation and provides lower pollutant emissions than conventional combustion.

To enable energy recovery from agricultural by-products, it may be necessary to dry and compact them.

Compaction can be carried out as:

  • pellets
  • briquettes

This compacting allows a regular supply of fuel and a good circulation of the feed in the process.

COGEBIO has already validated the operation of the COGEBIO® process with many agricultural residues by conducting tests with its pilot unit. Do not hesitate to contact us to know the feasibility of a test with a particular fuel.