Circular Biomass Build Up

Solutions developed

LIFE CB2Us main objective is to demonstrate a circular economy concept for processing biomass waste from urban landscaping to produce biochar, generating in addition energy, achieving as a result district heating with negative net emissions in Stockholm. The project will create a biochar plant to process high volumes of biomass waste materials into biochar via the pyrolysis process. The excess heat will be used in urban district heating, while the biochar will be used as an urban soil supplement to close nutrient cycles and return organic carbon to the biosphere. The project will thus create a biological cycle in which nutrients and carbon are circulated back into the biosphere.

Main results

Expected results:

Demonstration of a circular business model at scale that is financially sustainable after the end of the project;
Construction of a demonstration plant that will use 25 000 t/y of biomass to produce 5 000 t/y of biochar for urban landscaping, thus reducing dependency on imports of biochar and replacing up to 53 000 t/y of soil, around 9% of the total annual soil production in Sweden. The biochar produced can be used over an area of 27 ha/y. Consumption of 5 000 t/y of conventional soil based on finite resources such as clay, sand and peat will be avoided along with the use of regular industrial fertilisers since at least 8 t/y of phosphorus, 60 t/y of potassium and 5 t/y of nitrogen will be circulated back to the soil;Expected results:
Demonstration of a circular business model at scale that is financially sustainable after the end of the project;
Construction of a demonstration plant that will use 25 000 t/y of biomass to produce 5 000 t/y of biochar for urban landscaping, thus reducing dependency on imports of biochar and replacing up to 53 000 t/y of soil, around 9% of the total annual soil production in Sweden. The biochar produced can be used over an area of 27 ha/y. Consumption of 5 000 t/y of conventional soil based on finite resources such as clay, sand and peat will be avoided along with the use of regular industrial fertilisers since at least 8 t/y of phosphorus, 60 t/y of potassium and 5 t/y of nitrogen will be circulated back to the soil;