New enzymes generation to reduce energy consumption in thermomechanical pulping, 2016 International Mechanical Pulping (IMPC) Conference
The development and use of biotechnology in the pulp and paper industry started in the early 1970s and depends mainly on the production of inexpensive biocatalysts in great volumes and weights for industrial
applications. For many years, a lot of research focused on the treatment of wood chips with white-rot fungi in order to decrease the energy consumption and to enhance the pulp quality, but specific investment and time for fungi growth are needed. Besides, different fungal enzymes (xylanases, cellulases, pectinases and laccases) were isolated and tested at different scales, showing the interest of such pre-treatment to facilitate the fibre separation into the refiners.
Compared to fungal enzymes, bacterial ones present the advantages of being more adapted to the mechanical process conditions, especially temperature. The objective of this work was to study the impact
of different mixtures of bacterial enzymes (cellulases, pectinases, laccases and xylanases) on specific energy savings without degrading the pulp properties. All the experiments were carried out at pilot plant
scale in order to enable the transfer of the most promising ones in an industrial production unit.
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