The effect of blending spruce and poplar on acid-catalyzed steam pretreatment and enzymatic hydrolysis

Research output: Contribution to journalArticle


The aim of this work was to explore the possibility of mixed feedstocks utilization using acid-catalyzed steam pretreatment in the context of forest biomass. Three steam pretreatment conditions were applied to characterize the interactions between spruce (softwood) and poplar (hardwood) that were concurrently processed by SO2-catalyzed steam pretreatment and enzymatic hydrolysis. The effects of blending feedstocks were evaluated in terms of composition and enzymatic digestibility. The combined sugar yields after steam pretreatment and enzymatic hydrolysis ranged from 58% to 71%. No synergistic or antagonistic interactions were observed in the concurrent use of spruce and poplar—our linear interpolation model accurately predicted the overall sugar recovery after steam pretreatment and enzymatic hydrolysis for a 50:50 blend to within 3%, based on the results of the individual feedstocks.


External organisations
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Chemical Engineering


  • Enzymatic hydrolysis, Hardwood, Mixed feedstocks, Softwood, Steam pretreatment
Original languageEnglish
Article number100241
JournalBioresource Technology Reports
Publication statusPublished - 2019 Sep 1
Publication categoryResearch