Valtion Teknillinen Tutkimuskeskus

Xyrofin Oy

Eriksson Capital Ab

Annikka Mustranta

Liisa Viikari

Heikki O Heikkila

Marja-Leena Sarkki

Kaisa Poutanen

Leena Fagern&auml;s

Tor Johansson

Merja Itavaara

Osmo Ojamo

The invention relates to a process for enhancing the concentration of the fiber derived dissolved and colloidal substances in process water that comes from mechanical pulping. According to the invention, process water is treated with enzyme preparations that have an effect on carbohydrates and that contain mannanase and/or endoglucanase, in particular, which break down the soluble carbohydrate polymers contained by the process water into low molecular weight oligosaccharides. The treatment prevents an increase in viscosity so that process water can be concentrated into a high dry content, or the treatment can be used to lower the viscosity of previously concentrated process water to facilitate after-treatment.

Process for concentrating soluble and colloidal substances in process waters

Process for the production of xylose by hydrolysis of hemicellulose by

A method of destruction of sausage skins and other mainly cellulosic substances by means of dissolution with an enzyme solution. Enzymes are added to a reactor that contains a water solution, after or before which the substances to be dissolved are added to the reactor. The substances to be dissolved are dissolved partly or completely, after which a new amount of substances to be dissolved are added to the reactor. When the enzymes have been adsorbed into the new substances to be dissolved, the solution containing the substances dissolved are recovered by separating the solution and the substances to be dissolved from each other, whereby water is added to the substances to be dissolved and if desired, the four foregoing steps are repeated a wished amount of times.

Method of dissolution of sausage skins and other cellulosic substances

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Espoo, Finland

Annikka Mustranta