Biomass pre-treatment for bioenergy – Case study 2: pre-treatment options for forest based residues

Oct 2018

This case study discusses the merits of various pretreatment options for forest based residues using practical conditions as prevailing in Canada, such as

  • moisture management by passive and active drying, covering, blending, and monitoring and modelling of moisture content;
  • physical property management by chipping, grinding, sieving and machine visualization;
  • ash content management by washing;
  • density management by pelletizing.

The study shows that such pre-treatment processes can be very effective in upgrading the physical and chemical properties of biomass feedstock in order to facilitate and/or avoid stoppage of downstream processes. The usability and value of forest biomass for various end-uses can thus be increased by appropriate pre-treatments: they can significantly improve the quality, storability and transportability of biomass and enable more versatile end-uses, as well as cleaner combustion and energy production especially for small users.