食品科学 ›› 2005, Vol. 26 ›› Issue (10): 54-57.

• 基础研究 • 上一篇    下一篇

克鲁维酵母固体发酵高产菊粉酶的研究

 陈雄, 王金华, 李世杰   

  1. 湖北工业大学生物工程学院 湖北省工业微生物学重点实验室
  • 出版日期:2005-10-15 发布日期:2011-09-25

High Yield of Inulinase from Kluyveromyces S120 by Solid-state Fermentation

 CHEN  Xiong, WANG  Jin-Hua, LI  Shi-Jie   

  1. Key Laboratory of Industrial Microbiology of Hubei Province, College of Bioengineering, Hubei University of Technology
  • Online:2005-10-15 Published:2011-09-25

摘要: 首次利用固体发酵对筛选得到的一株克鲁维酵母S120高产菊粉酶的发酵工艺进行了初步研究。结果表明:麸皮是菌株S120产酶的最适基质,10%菊芋粉和0.5%硫酸铵有助于产酶;优化培养条件为:在300ml三角瓶中装料量20.0g,含水量为66%(V/W),起始pH5.7,培养温度34℃,接种量3.9%(V/W),发酵72h,菊粉酶酶活为118.28U/g(干重)。菌株S120菊粉酶的合成属于延续合成型,在工业生产中具有应用前景。

关键词: 克鲁维酵母, 固体发酵, 菊粉酶

Abstract: This paper firstly studied the high levels of inulinase by Kluyveromyces S120 under solid-state fermentation (SSF). The results showed that wheat bran was the best solid substrate, 10% inulin and 0.5% (NH4)2SO4 could enhance the yield of inulinase. The optimized process parameters were 20.0g medium in 300ml flask, initial moisture content of solid substrate 66%, initial pH of the medium 5.7, incubation temperature 34℃, inoculum size 3.9% and fermentation time 72h. The average yield in triplicate under optimal conditions was 118.28U/g(Dry Weight). Inulinase was produced in partial parallel with the strain growth, which made Kluyveromyces S120 promising for a potential application in industrial scale.

Key words: Kluyveromyces, solid-state fermentation, inulinase