Conditions for ethanol production during bioconversion of cellulose-containing raw material

被引:2
|
作者
Zyabreva, NV
Isakova, EP
Biryukov, VV
机构
[1] State Res Inst Prot Biosynth, Moscow 109004, Russia
[2] Russian Acad Sci, Bach Inst Biochem, Moscow 117071, Russia
基金
俄罗斯基础研究基金会;
关键词
D O I
10.1023/A:1010293907171
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Several natural associations composed of thermophilic anaerobic bacteria capable of utilizing various cellulose materials at 60 +/- 2 degreesC and pH 6.0-7.0 were isolated from the sludge of Kamchatka geothermal springs. The rate of ethanol production (up to 1.7 g/l per day) and the concentration of ethanol in the medium (up to 1.2%), as well as the fermentation period (10-15 days), were determined under anaerobic conditions in the presence of cellulose, coniferous sawdust, newsprint, or paper pulp as a carbon source. Microorganisms were found that inhibited the production of ethanol. The initial pH value was found to influence both the ethanol production rate and ethanol/acetate ratio. A pH decrease from 7.0 to 5.0 led to a 6.7-fold increase in ethanol production and caused a 23.8-fold increase in the ethanol/acetate ratio.
引用
收藏
页码:483 / 488
页数:6
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