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标题：Fermentasi Etanol dari Ubi Jalar ( Ipomoea batatas ) oleh Kultur Campuran Rhizopus oryzae dan Saccharomyces cerevisiae
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作者：DIAN ARYANI ; TJAHJADI PURWOKO ; RATNA SETYANINGSIH 等
期刊名称：Bioteknologi
印刷版ISSN：0216-6887
出版年度：2004
卷号：1
期号：1
页码：13-18
DOI：10.13057/biotek/c010103
出版社：UNS Solo
摘要：Saccharomyces cerevisiae was known to ferment glucose into ethanol, but S.cerevisiae could not ferment starch into ethanol. This research was to studyethanol fermentation from sweet potato by mix cultures of Rhizopus oryzaeand S. cerevisiae. The medium was prepared 10, 15 and 20%(b/v) sweetpotato in aquadest into jam’s bottle. The media (50 mL) was inoculated with1 mL S. cerevisiae 1x106 cfu/mL. After covered by Whatman paper No.41, thebottle added with another 50 mL medium and inoculated with 1 mL R.oryzae 1x105 cfu/mL. Concentration of reducing of sugar, starch, ethanol andbiomass was measured everyday. The result showed that 10% sweet potatomedium produced the highest content of ethanol that was an amount2.647% followed by 15% sweet potato medium was 2.623% and 20% sweetpotato medium was 2.163%. The optimum fermentation duration to producethe highest content of ethanol was 5 days
关键词：ethanol fermentation; sweet potato; mixture culture;Rhizopus oryzae; Saccharomyces cerevisiae