食品科学

• 生物工程 • 上一篇    下一篇

红曲霉固态发酵产生淀粉酶培养基的优化

刘 波,曾丽萍,邬应龙   

  1. 四川农业大学食品学院,四川 雅安 625014
  • 出版日期:2014-04-15 发布日期:2014-04-18

Optimization of Medium Components for the Production of Raw-Starch-Digesting Amylase by Monascus M2 in Solid State Fermentation

LIU Bo, ZENG Li-ping, WU Ying-long   

  1. College of Food Science, Sichuan Agricultural University, Ya’an 625014, China
  • Online:2014-04-15 Published:2014-04-18

摘要:

研究碳源、氮源、无机盐对红曲霉M2固态发酵产生淀粉酶的酶活性影响。在单因素试验的基础上,采用响应面试验设计对红曲霉固态发酵产生淀粉酶的培养基进行优化,并建立乳糖、(NH4)2SO4、K2HPO4变化的二次回归方程,探讨各因素对生淀粉酶酶活力的影响。在固态发酵基础培养基中,最终确定适宜的培养基条件为:乳糖添加量为8.18%、(NH4)2SO4添加量为6.36%、K2HPO4添加量为0.91%;在该条件下可得到红曲霉M2产生淀粉酶的最大酶活力,预测值为680.29 U/g,对实验结果进行验证,得到生淀粉酶酶活力为662.21 U/g。

关键词: 红曲霉, 固态发酵, 生淀粉酶, Box-Behnken试验设计

Abstract:

The activity of raw-starch-digesting amylase produced by Monascus M2 in solid state fermentation wasinvestigated with respect to three medium components including carbon source, nitrogen source and inorganic salt. Responsesurface methodology was used to optimize three different levels of lactose, (NH4)2SO4 and K2HPO4 by setting up a quadraticregression model. The optimized basic solid medium contained 8.18% lactose, 6.36% (NH4)2SO4 and 0.91% K2HPO4. Theresulting maximum predicted activity of raw-starch-digesting amylase was 680.29 U/g, compared to 662.21 U/g observed invalidation experiments.

Key words: Monascus, solid-state fermentation, raw-starch-digesting amylase, Box-Behnken experiment design