食品科学

• 生物工程 • 上一篇    下一篇

棘孢青霉菌发酵产右旋糖酐酶的条件优化

曹研研,张洪斌*,李若菡,刘 昆   

  1. 合肥工业大学医学工程学院,安徽 合肥 230009
  • 出版日期:2015-12-15 发布日期:2015-12-24

Optimization of Fermentation Conditions for Dextranase Production by Penicillium aculeatum

CAO Yanyan, ZHANG Hongbin*, LI Ruohan, LIU Kun   

  1. School of Medical Engineering, Hefei University of Technology, Hefei 230009, China
  • Online:2015-12-15 Published:2015-12-24

摘要:

为优化棘孢青霉菌F1001产右旋糖酐酶的发酵条件,以培养基装载量、蛋白胨和右旋糖酐T70添加量为主要影响因素,结合其他发酵条件,在单因素试验的基础上,运用Box-Behnken试验设计原理,探讨培养基装载量、蛋白胨和右旋糖酐T70添加量的最佳组合。结果表明,蛋白胨添加量3 g/L、右旋糖酐T70添加量14 g/L、培养基装载量85 mL/250 mL,右旋糖酐酶活力最高可达到453 U/mL,比优化前提高88%。通过测定发酵过程中酶活力、pH值、蛋白质含量的变化,进一步验证发酵84 h酶活力达到最大,此时蛋白质含量达到最高,pH值达到3.9。

关键词: 棘孢青霉, 右旋糖酐酶, 响应面分析, 发酵条件

Abstract:

The fermentation conditions for dextranase production by Penicillium aculeatum F1001 were optimized using
a Box-Behnken design with response surface methodology. The optimal fermentation conditions were determined as
follows: peptone 3 g/L, dextran T70 14 g/L, and medium loading, 85 mL in a 250-mL flask. Under these conditions,
dextranase activity was 453 U/mL, indicating an 88% improvement over that before optimization. The changes in dextranase
activity, pH and protein content during the fermentation process verified that dextranase activity reached its highest level at
84 h, when the pH was 3.9.

Key words: Penicillium aculeatum, dextranase, response surface analysis, fermentation conditions

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