Creating The Circular Carbon Economy

Rethinking landfill covering

Landfill sites have to be covered at the end of their useful life, and the material used to cover them has to meet legal requirements in terms of water retention capacity. Materials (soils) that meet these requirements are expensive to purchase for landfill operators.

The addition of biochar to low quality and therefore low cost materials can increase their water holding capacity, making them suitable for use as landfill cover.

As part of the THREE C project, the first laboratory experiments have been carried out to open up this field of application for biochar – with very promising initial results!

As large quantities of material are needed to cover landfills, this is an area where large quantities of biochar can be used and therefore a tremendous potential CO2 sink.

For more information, please contact THREE C member Bernhard Schäfer via

Photo: Ponchitos at, licensed under