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Development of Large Scale System and Establishment of Control Organization for Solubilization and Resource Conversion of Biowaste

生物废物溶解和资源化大规模系统的开发和控制组织的建立

基本信息

批准号：
07680600
负责人：
SAWADA Tatsuro
金额：
$ 1.47万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07680600/
关键词：
biowaste steam explosion enzymatic saccharification alcohol fermentation epoxy resin

项目摘要

Effective systems of steam explosion, enzymatic hydrolysis, alcohol fermentation, and resinification were developed for solublization and resource conversion of biowaste. Rice straw as a biowaste was exploded under various operational conditions such as steam pressure of 2.55-4.02 MPa and steaming time of 0.5-10 min. The exploded rice straw was separated into water soluble material, methanol soluble lignin, Klason lignin, and mixture of cellulose and low molecular substance. The effects of steam explosion on the characteristics of the exploded rice straw were studied from the point of view of pH,pore size distribution, amounts of extractive components, and enzymatic saccharification. The enzymatic saccharification was expressed as a function of steam pressure and steaming time. It was estimated from the equation that maximum saccharification was obtained at a steam pressure of 3.3-3.8 MPa and a steaming time of 1.8-2.2 min. Glucose and xylose in the enzymatic hydrolyzate were converted into ethanol rapidly and efficiently. The amount of ethanol produced reached the maximum value at a flow rate of 0.2 vvm. A bioreactor coupled with pervaporation using a polytetrafluoroethylene membrane was developed for the produdction of a higher ethanol concentration from the enzymatic hydrolyzate. The methanol soluble lignin in the rice straw exploded at a steam pressure of 3.53 MPa and a steaming time of 2 min was converted into an excellent thermosetting resin by the epoxy reaction.

开发了蒸汽爆破法、酶解法、酒精发酵法和树脂化法等有效体系，实现了生物质废弃物的溶解和资源化。以稻草为原料，在蒸汽压力为2.55~4.02 Mpa、蒸汽时间为0.5~10min的不同操作条件下进行了爆破试验。将稻草爆裂后分离出水溶性物质、甲醇可溶木质素、克拉森木质素和纤维素与低分子物质的混合物。从pH值、孔径分布、萃取物含量和酶糖化等方面研究了蒸汽爆破对稻草爆裂特性的影响。酶糖化反应表现为蒸气压力和蒸煮时间的函数。由方程推算出，在水蒸气压力为3.3~3.8 Mpa，蒸煮时间为1.8~2.2min时，糖化效果最好。酶解液中的葡萄糖和木糖能快速、高效地转化为乙醇。当流速为0.2VVM时，乙醇量达到最大值。为了从酶解液中生产较高浓度的乙醇，研制了一种与聚四氟乙烯膜渗透蒸发耦合的生物反应器。稻草中的甲醇可溶木质素在3.53 Mpa的水蒸气压力下爆裂，2min的水蒸气通过环氧反应转化为性能优良的热固性树脂。