Soilfood, a Finnish circular economy company, is processing the fibre-based side streams generated in the production of paperboard from manufacturer Metsä Board, into various soil improvement fibres for local farms. Soilfood has previously used these side streams from Metsä Board's board mills at Kemi and Äänekoski. Now the cooperation has been extended to the Tako mill, located in the centre of Tampere.

Metsä Board's cooperation with Soilfood started with a research project initiated in 2015 by the Natural Resources Institute Finland. The study looked at how wood-based fibre sludge had the ability to reduce erosion and nutrients leaching from fields to water bodies. The large-scale use of side streams is part of a new circular economy approach, where raw materials are kept in use as long as possible and existing materials are re-used.

The two companies are also working together to develop other new solutions for the beneficial use of existing production side streams. "Our goal is to have zero landfill waste from the processes of our paperboard mills after 2030. Currently, more than 99 per cent of our production side streams are used either as materials or energy.