Optimal technichal method for recycling wood resources

木材工业产生的木材废弃物，甚至是房屋拆迁产生的木材废弃物，原本是作为木片和燃料的再生原料，但现在往往被当作垃圾倾倒或焚烧。该项目旨在有效地再利用被拆除房屋的木材和使用过的木制品。根据本研究结果，可得出以下结论：（1）利用拆迁木材生产刨花板。刨花板的质量与原始木片相当。(2)采用燃烧和热降解两种方法对木材防腐剂的回收进行了研究。这种方法可以作为跟踪测试。(3)研究了一种废旧木材的快速炭化方法。对废旧木材如废木料、集成材、木屑、锯屑、腐朽木材等进行炭化处理后，其吸附性和润湿性随炭化温度的升高而增强。(4)林下残木被分解，木炭被扩散到森林中。(5)木材液化后的聚氨酯泡沫塑料易被生物降解和光降解加速。人们认为这种复合材料对环境的影响较小。

Wood waste from wood industry, even that from demolished house, has been originally used for chip and fuel as a recycled raw material, but it recentry tends to be dumped or burned as rubbish. This project aims to re-use the timber from demolished houses and used wood products effectively. Based from the results of this study, the following conclusions could be drawn :(1) Wood chip from the timber of demolished house was used for particleboard. The quality of the particleboard was equal to that from virgin wood chip.(2) Recovery of wood preservatives was investigated by burning and heat degradation. This method could be useful as a tracing testing.(3) A rapid carbonizing method for used timber was investigated. A variety of used timbers, such as used colomn, glulam, chip, saw dust and decay wood, were carbonized, and then their ability of absorption and wettability tend to be increased in increasing carbonizing temperature.(4) Wood residu in forest was carbonized and the charcoals were spread into forest.(5) The bio-degradation and photo-degradation of poliyurethane foam from liquefied wood is easily accelerated. This composite is recognized to be less environmental impact.