Biorefining of bark in biochemical conversion and in forest-industrial processes

Bark is an underutilized residual stream from pulp and saw mills and its utilization in biochemical conversion is not well investigated.
This project will address the technical and economic potential of separate biorefining of fresh bark through innovative pre-processing technology and green extraction. The project covers the predominant bark varieties in Sweden, i.e., bark from spruce, pine and birch. Preliminary experiments indicate that high extraction yields can be obtained and with that also new products, such as bark-based fatty and resin acids and polyphenols.
In biochemical conversion, debarking is not necessarily a part of the process, and separate biorefining of bark through green extraction will be weighed against the common approach to include wood and bark mixtures in pre-treatment and saccharification steps.
Better use of bark has potential to provide more liquid biofuel without increased withdrawal of forest resources, new products, and improved biochemical conversion.

Leif Jönsson
Umeå University
leif.jonsson@umu.se
Project information
Participants
Umeå University
Swedish University of Agriculture (SLU)
SEKAB BioFuels & Chemicals AB
Time schedule
November 2022 - December 2025
Total cost of project
5 477 816 SEK
Swedish Energy Agency project number
2022-00569
More projects

Biorefinery: scale-up of 5-HMF derivatives
The overall aimof this project is to transform chemical industries from using fossil feedstock to using renewable biomass. In this project, we…
Manager: Louise Olsson
Ongoing

Online optimization of biomass high-temperature energy conversion processes
Variations of operational parameters are one of the most critical uncertainties in practical thermochemical conversion processes. Diagnostics and feedback control of these…
Manager: Alexey Sepman
Ongoing

Ground-breaking trials for efficient bioash as a sustainable resource
This project aims to streamline recycling of biogenic ash to forest land, but also to study how different ash transformations affect their…
Manager: Mikael Thyrel
Ongoing