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KMID : 0366119760040010001
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Korean Journal of Applied Microbiology & Bioengineering
1976 Volume.4 No. 1 p.1 ~ p.8
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Studies on the Fermentive Utilization of Cellulosic Wastes
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Abstract
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For the production of microbial cell from cellulosic wastes such as used newspaper, sawdust, rice hull, peanut hull and rice straw, methods of their acid-hydrolysis and suitability as fermentable sugar solution were investigated. The results obtained were summerized as follows;
1. More than 57% of crude cellulose was found in sawdust and peanut hull, and rice straw showed highest crude protein content of 5.4%, where as used newspaper showed 3.7% of fat.
2. When the materials was pretreated with 10% hydrochloride for 3 hours at 40℃ and diluted to 2%, hydrlyzed for 30 min., at 1kg/㎠, rice straw was hydrolyzed to 31.2 % of reducing sugar, whereas the others were less than 16%.
3. When the acid―hydrolysis was carried out with 2% sulfuric acid, at 1kg/㎠, which pretreated 60 to 70% of sulfuric acid 40℃ of temperature, reducing sugar produced 47 to 56% per waste materials.
4. On the pretreatment with 60% sulfuric acid a most effective material and acid solution ratio was 1:2, and the methods of hydrolysis were 0.5 to4% of acid concentration for 10 min., at 1kg/㎠.
5. Peanut hull and rice straw contained evenly six kinds of inorganic components and potosium was much in the rice hull, whereas sawdust and useless paper were much calcium and magnesium, respectively.
6. Furfural of hydrolyzed solution were contained much in the case of rice straw and its hull, and formic acid was plenty useless paper and peanut hull. Furfural was evaporated by boiling at 100℃ and formic acid didn´t.
7. More than 0.008% of furfural and formic acid inhibited yeast propagation remarkbly, but its inhibitory action were didn´t large up to 0.008%
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