Effective use of the saccharide involved in drainage from paper manufacturing and cellulose powder producing processes.

通过对纤维素生物质的有效利用，制备了细菌生产纤维素的培养基。采用浓硫酸法对造纸污泥中的废浆进行两段水解。为确定合适的水解条件，分别测定了第一次和第二次水解时的硫酸浓度。第一次用72%以上的硫酸处理，第二次在100℃下用5 ~ 25%的硫酸处理，纤维素几乎完全转化为葡萄糖。第二次水解的时间与所用硫酸的浓度有很大关系。由于纤维素粉产品是用硫酸对漂白纸浆进行部分水解制备的，因此该工艺的排出物中含有大量有用的还原糖，但也含有硫酸。在本研究中，为了有效利用纤维素水解产物中的葡萄糖和废水中的还原糖，采用电渗析的方法研究了与糖共存的硫酸的去除。电渗析所得的糖溶液用于培养基的制备。

The culture medium for bacterial cellulose production was prepared by effective use of cellulosic biomass. The waste pulp in paper sludge was hydrolyzed by two-stage hydrolysis in concentrated sulfuric acid process. To get suitable conditions, the concentration of sulfuric acid were examined at the first and second hydrolysissatage, respectively. When treated with more 72% sulfuric acid at the first, with 5〜25% under 100℃ at the second, cellulose was converted to glucosse almost completely. The time of hydrolysis at the second was highly depend on the concentration of sulfuric acid used.Since cellulose powder products were prepared by the partial hyrolysis of bleached pulp with sulfuric acid, the drainage of the process includes a large quantity of useful reducing sugars, but it also contains sulfuric acid.In this study, for effective use of glucose in the cellulose hydrolyzate and reducing sugars in the drainage, the removal of the sulfuric acid coexisting with the saccharide was examined by means of electrodialysis. The saccharide solutions avairable from electrodialysis were used for the preparation of the culture medium.