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Efficient use of sawdust

03.06.2015

Sawdust obtained from the production of industrial wood was previously used in paper production. Now it is considered unprofitable, and they are burned. However, the combustion energy of sawdust is small, and it can be raised by getting rid of one of the components of wood - hemicellulose. These are not very long polysaccharide molecules that strengthen the walls of plant cells. Moreover, such purification can provide not only good fuel, but also useful substances, primarily xylan saccharide, from which the hemicellulose molecule is mainly built.

Petri Kilpelainen from the Natural Resources Institute of Finland developed a process for extracting xylan from birch sawdust in his thesis. This process involves boiling sawdust in water at high pressure. Not only xylan is released into the water, but also some organic acids. By separating them from water, it is possible to obtain valuable chemical raw materials. Xylan is an oxygen-impervious food film, and can also be converted to xylitol, a sweetener that is thought to prevent cavities.

The Kilpelainen process has already been tested not only in laboratory conditions, but also on a large-scale pilot plant.

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The new center will be powered by the Susquehanna Nuclear Power Plant, located nearby in this area in northeastern Pennsylvania. The power of this energy source is 2,5 GW, which should fully ensure the operation of the center.

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