Probleme bei der thermischen Verwertung von Wald-, Rest- und Altholz

One of the most difficult problems is the distinction between treated and untreated wood. The thermal utilization of treated wood in Germany is more restrictively regulated than that for untreated wood. Accordingly, due to insufficient possibilities for use in particle board production, biological treatment, dumping, and the strong restrictively regulated export, it is necessary to burn wood and wood residues. Even in untreated woods chemical elements are present, which are also contained in wood preservatives, e.g. you can find mercury, arsenic, fluorine, chromium, copper, or tin in different quantities in natural wood. In Germany, it is prohibited to burn treated wood in plants without air cleaning equipment. Under economic aspects it would be too expensive to use plants with air cleaning equipment for burning wood. It is therefore necessary in Germany to determine some parameters to characterize the natural condition. This would be additional a basis for the distinction between treated und untreated wood.