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Contenu archivé le 2024-04-16

IMPROVEMENT IN EFFICIENCY AND ENVIRONMENTAL CHARACTERISTICS OF PRESERVATIVE TREATMENTS

Objectif

The research work to be carried out is focused on the development of less toxic and environmentally safer wood preservatives and protection methods. It includes methods for bioconversion of treated wood waste, recycling of inorganic preservatives and detoxification of compost from treated wood waste for horticulture and landscaping. Finally, strategies are elaborated to show the benefits and risks of alternative preservative systems in order to reveal consequences when changing from high toxic wood preservatives to chemicals of lower impact to the environment. The aim of the proposal is to keep European wood a competitive material under weathering conditions and in ground contact.
The project covers a wide range of research areas, such as examination of wood preservatives which are less harmful to the environment. To quote some examples: by substituting organic fungicides in light organic solvents, by improving existing and evaluating new impregnation methods based on vapour phase diffusion techniques for the treatment of dry solid wood products in order to provide an advanced production technology with regard to pollution control, by developing methods for a safe bioconversion of treated wood waste and for recycling of inorganic preservative components. Finally, a short survey will be presented on strategies which show the benefits and risks of alternative preservative systems revealing the consequences of changing from high toxic wood preservatives to chemicals of lower impact to the environment.
It is expected that the project will result in the development of less toxic and environmentally safer wood preservatives, preservations methods and at the same time keep home grown wood competitive as a construction material. This goal is undoutedly an important progressive move within the policy of the EEC. Moreover, it is important in this way to give an economic and technical stimulus to the European wood sector and wood protection and to provide technical data to future EG standards.

The management structure of the research programme includes the organization of:

Development of gas diffusion techniques for the preservation of refractory species by:

selection of potential chemicals;
treatment of timber cross sections and joinery components;
penetration and retention assessment;
analyses of leaching and redistribution of preservatives;
combination of treatment and drying.

Biological conversion of treated wood waste by:

isolation of microorganisms from impregnated wood;
physiological tests;
efficacy tests;
converting fixed inorganic preservatives into water soluble components;
putting into practice methods for converting impregnated wood waste into preservative free and safe compost.

Development of strategies for the evaluation of low toxic alternatives to CCA by:

collecting information;
forming a database.

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Coordinateur

FEDERAL RESEARCH CENTRE FOR FORESTRY AND FOREST PRODUCTS
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Leuschnerstrasse 91
21031 HAMBURG
Allemagne

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