March 2007 - Valuable resources such as the rain forest can be saved by using wood fiber materials. They are very economical and moreover much better priced than solid wood. For these reasons, it is obvious that in the furniture industry more and more wood fiber materials are used.
The disadvantage, however, up to now consisted of the large quantities of organic-loaded effluents produced in the manufacture. After several plants in German, GEA Wiegand is delivering now a combined evaporation and membrane filtration plant for the treatment of eucalyptus wood effluents to Spain. The plant consists of a single-effect pre-evaporator with mechanical vapor recompression and a reverse osmosis plant for condensate treatment. With this plant combination, the process waters can be concentrated economically and the requested COD discharge conditions of less than 500 mg O2/liter are observed.