The increasing energetic utilization of the various wood types presents a significant challenge for the wood-based materials industry. According to the current German waste wood ordinance, only certain waste woods are permissible for material use. These include pallets, packaging or furniture without coatings or wood preservatives. As homogeneous separation and the rapid analysis of organic and inorganic wood preservatives is at present barely possible or takes too long, higher-quality assortments are also currently being incinerated.
At the Fraunhofer Institute for Wood Research WKI, process engineering concepts for a more efficient material utilization of recycling wood are being developed. The goal is to sort these materials with the highest possible degree of separation and therefore to significantly increase the recovery rate. Above all, the use of large wooden components such as, for example, roof beams - which is currently still difficult due to the German waste wood ordinance - offers a large potential for the reutilization of wood. According to the waste wood ordinance, timber framework, for example, must not be reutilized as it has been treated with wood preservatives. In the project 'CaReWood Cascading Recovered Wood', the WKI is researching fast mobile methods for the detection of organic and inorganic wood preservatives directly at the construction site. With previous methods, the results are available after 14 days; the new methods require only 14 minutes. This enables decisions regarding the further usage to be made directly on site, in order to comply with the waste wood ordinance and nevertheless still utilize the existing waste wood resources. Within the CaReWood project, 15 partners from 5 countries are working together with the goal of developing a concept for the usage of waste wood resources. Within the CaReWood project, 15 partners from 5 countries are working together with the goal of developing a concept for the usage of waste wood.