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当前位置: 首页 > 文章 > 树干毕赤酵母单级连续发酵制取乙醇的研究 南京林业大学学报(自然科学版) 2007,31 (5) 10-14
Position: Home > Articles > Production of Ethanol Through Single-stage Continuous Fermentation by Pichia stipitis Journal of Nanjing Forestry University(Natural Sciences Edition) 2007,31 (5) 10-14

树干毕赤酵母单级连续发酵制取乙醇的研究

作  者：
王杏文;季更生;勇强;余世袁
单  位：
南京林业大学化学工程学院;江苏科技大学生物与环境工程学院
关键词：
树干毕赤酵母;连续发酵;乙醇
摘  要：
研究了稀释率、流加糖浓度和初始酵母浓度对树干毕赤酵母单级连续发酵的影响。结果表明:稀释率对单级连续发酵影响较大,当流加糖浓度为45 g/L、稀释率为0.04~0.06 h-1时发酵效果较好,乙醇得率可达0.370~0.372 g/g,产率为0.586~0.754 g/(L.h)。在稀释率为0.06 h-1时,较为适宜的流加糖浓度为45 g/L,此时乙醇产率为0.785 g/(L.h)。只要稀释率和流加糖浓度确定,初始酵母浓度不会对达到"稳态"的单级连续发酵产生影响。当稀释率一定时,发酵40 h后基本可达到"稳态",此后各参数均稳定在一定范围内,可稳定连续发酵104 h。
译  名：
Production of Ethanol Through Single-stage Continuous Fermentation by Pichia stipitis
作  者：
WANG Xing-wen1,JI Geng-sheng2,YONG Qiang1,YU Shi-yuan1(1.College of Chemical Engineering Nanjing Forestry University,Nanjing 210037,China;2.College of Biology and Environmental Engineering Jiangsu Science and Technology University,Zhenjiang 212018,China)
关键词：
Pichia stipitis;Continuous fermentation;Ethanol
摘  要：
Effects of dilution rates,influent sugar concentration and initial yeasts concentration on single-stage continuous fermentation were investigated.The results showed that dilution rates had significant influence on continuous fermentation.When influent sugar concentration was 45 g/L,continuous fermentation arrived at a satisfactory purpose at dilution rates 0.04～0.06 h-1,ethanol yield for 0.370～0.372 g/g and ethanol productivity for 0.586～0.754 g/(L·h).At dilution rates 0.06 h-1,the preferable influent sugar concentration was 45 g/L,while ethanol productivity was 0.785 g/(L·h).If dilution rates and influent sugar concentration were determinated,initial yeasts concentration had little effects on single-stage continuous fermentation.Though single-stage continuous fermentation for total 288 h at two different dilution rates,the steady stage was obtained effects 40 h of continuous fermentation,and various parameters held stable for about 104 h.

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