Forest residues in circular systems

In this project, raw material owners, converters, customers, universities, and authorities collaborate to collectively harness forest resources, close loops, and reduce the use of finite resources. The nutrients and minerals that trees absorb as they grow accumulate in sludge and ashes at pulp mills.

Today, acidification is countered through ash recycling, and forests are fertilized with mineral fertilizers. To reduce the use of fossil resources, the loop should be closed, and sludge and ashes should be seen as valuable resources. By processing the sludge into hydrochar and mixing it with biomass ash, a new product is created that can both fertilize and alkalize forest soil or be used as a growing medium and nutrient in forest nurseries.

In this project, we aim to develop technology and investigate environmental effects in soil and nurseries. We'll explore the opportunities and obstacles before the product can be used on a large scale, as well as whether there are business opportunities when byproducts are recycled and the loop is closed.

Project Leader
Maria Sandberg

Project Duration
September 1, 2023, to May 31, 2026