Spruce Bark Biorefinery

K. Kemppainen, T. Niemelä, J. Inkinen, J. Uusitalo, S. Kaijaluoto, L. Sorsamäki, O. Aaltonen, A. Suurnäkki, S. Peltonen, H. Mikkonen, V. Grönberg, K. Kruus, T. Nakari-Setälä & M. Siika-Aho
Norway spruce Picea abies is a key raw material for the forest industry in the Nordic countries. In order to improve the competitiveness of the forest industry by valorising residues and creating value from new products, we have studied the upgrading of spruce bark into transport fuels and chemicals. Different fractionation, pretreatment and enzymatic steps were carried out for industrial spruce bark to solubilize condensed tannin, purify the tannin extract, and to hydrolyse and ferment...