Development of Total Utilization Method of Woody Waste by Green Technology

绿色技术开发木本废弃物综合利用方法

基本信息

批准号：
15360483
负责人：
NAKAMURA Yoshitoshi
金额：
$ 9.92万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

Woody biomass is renewable resources that can be converted into useful materials and energy. The amount of carbon contained in woody waste annually occurred and emitted into environment in Japan is about 30-40% of carbon consumed to produce a variety of petrochemicals from oil. The development of industrial technique for converting a raw material into useful materials and products completely without generating pollutants such as waste gas, wastewater, and solid waste materials is expected significantly for the global environmental protection on the base of zero emission. The holocellulose, i.e. cellulose and hemicellulose, in woody waste such as wood chips, baggase, bamboo, bark, and sweet sorghum are natural organic resources utilizable for the production of sugars. However, the holocellulose are with difficulty converted into sugars by direct biological means in a native state because a lignin network covers the holocellulose layers in the cell walls. Various different physical, chem … More ical and biological pretreat-ments have been attempted to degrade the lignin in the biomass or to remove it from the holocellulose surface. In recent years, a steam explosion that consists of steam hydrolysis with a high temperature and pressure and a mechanical treatment of the hydrolyzed product with a sudden reduction of the pressure, has been attractive as an effective pretreatment for depolymelizing the lignin in woody biomass. In this work, the treatment and conversion system of plant biomass waste into useful materials was developed for zero emissions by using steam explosion and various conversion methods. This system was a significant conversion approach without generating pollutants, i.e. waste gas, wastewater, and solid waste materials. The conversion of woody wastes into useful materials was studied for the effective utilization of its components such as holocellulose, water-soluble material, methanol-soluble lignin, and Klason lignin. The holocellulose, water-soluble material, methanol-soluble lignin, and Klason lignin were converted into useful materials, i.e. lactic acid or antibacterial violet pigment and methane gas, monosaccharides and oligosaccharides, epoxy resin without an estrogenic activity, and activated carbon, respectively. The amounts of useful materials and products produced from each component were estimated, and the reduction of pollutants generated in their production process and waste treatment, and the detoxification of the lignin resin were confirmed. Less

木质生物质是可转化为有用材料和能源的可再生资源，日本每年产生并排放到环境中的木质废物中所含的碳量约为石油开发中生产各种石化产品所消耗的碳量的30-40%。在零排放的基础上，将原材料完全转化为有用材料和产品而不产生废气、废水和固体废物等污染物的工业技术对于全球环境保护具有重大意义。木屑、袋渣、竹子、树皮和甜高粱等木质废物中的纤维素和半纤维素是可用于生产糖的天然有机资源，然而，全纤维素在天然中很难通过直接生物方法转化为糖。状态是因为木质素网络覆盖了细胞壁中的全纤维素层，人们尝试了各种不同的物理、化学和生物预处理来降解这些物质。近年来，由高温高压蒸汽水解和突然减压对水解产物进行机械处理组成的蒸汽爆炸引起了人们的关注。作为木质生物质中木质素解聚的有效预处理，在这项工作中，通过使用蒸汽爆炸和各种转化方法，开发了植物生物质废物处理和转化为有用材料的系统，以实现零排放。研究了一种不产生废气、废水和固体废料等污染物的重要转化方法，将木本废弃物转化为有用材料，以有效利用其成分，如全纤维素、水溶性物质、甲醇溶性木质素、和克拉森木质素将全纤维素、水溶性材料、甲醇溶性木质素和克拉森木质素转化为有用的材料，即乳酸或抗菌紫色颜料和甲烷气体、单糖和低聚糖、无雌激素活性的环氧树脂和活性炭分别估算了每种成分产生的有用材料和产品的数量，以及其生产过程中产生的污染物和废物的减少量。处理，并证实了木质素树脂的解毒作用。