食品科学 ›› 2012, Vol. 33 ›› Issue (19): 216-222.

• 生物工程 • 上一篇    下一篇

响应面法优化黑曲霉发酵低聚异麦芽糖培养基

吴孔阳1,王学军2,周培华2,黄时海2,张云开2,陈桂光2,梁智群2,*   

  1. 1.广西大学轻工与食品工程学院 2.广西大学生命科学与技术学院
  • 收稿日期:2011-08-01 修回日期:2012-08-21 出版日期:2012-10-15 发布日期:2012-09-17
  • 通讯作者: 梁智群 E-mail:zqliang@gxu.edu.cn
  • 基金资助:

    国家高技术研究发展计划;国家自然科学基金

Response Surface Methodology for Optimization of Medium Composition for Isomaltooligosaccharide Production by Aspergillus niger CU-1

  • Received:2011-08-01 Revised:2012-08-21 Online:2012-10-15 Published:2012-09-17

摘要: 采用全因子试验、最陡爬坡试验以及Box-Behnken试验设计对黑曲霉CU-1(Aspergillus niger CU-1)发酵生产低聚异麦芽糖培养基的主要成分进行优化。结果表明:最优培养基成分为:麸皮浸汁体积分数4%、玉米浆添加量19.67g/L、NaNO3添加量2.24g/L、木薯淀粉糖化液添加量250g/L,在该培养条件下,在3.6L发酵罐中进行验证,发酵液中异麦芽糖、潘糖和异麦芽三糖总产量达到37.4%,低聚异麦芽糖总产量高达83.1%,说明Box-Behnken试验设计法用于黑曲霉发酵生产低聚异麦芽糖培养基优化是可行的,数学模型的预测值与实验观察值相符。

关键词: 黑曲霉, α-葡萄糖苷酶, 响应面分析法, 培养基优化, 低聚异麦芽糖

Abstract: The major fermentation medium components for isomaltooligosaccharide production by Aspergillus niger CU-1 were optimized by full factorial, steepest ascent and Box-Behnken designs. The optimal medium components were determined to be 4% wheat bran extract, 19.67 g/L corn steep liquor, 2.24 g/L NaNO3, and 250 g/L saccharified cassava starch. Fermentation of the optimized medium by Aspergillus niger CU-1 was carried out in a 3.6 L fermenter to obtain isomaltose, panose and isomaltotriose yield as high as 37.4%, an isomaltooligosaccharide yield as high as 83.1%. The good agreement between the predictive and actual values indicated that the mathematical model established based on Box-Behnken design was valid.

Key words: Aspergillus niger, α-glucosidase, response surface methodology, medium optimization, isomaltooligosaccharides

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