食品科学 ›› 2011, Vol. 32 ›› Issue (9): 246-250.doi: 10.7506/spkx1002-6630-201109055

• 生物工程 • 上一篇    下一篇

挤压米糠发酵生产γ-氨基丁酸的工艺条件优化

杨 叶,陈 野*,罗 垠,李秀明,郑晓晨   

  1. 天津科技大学食品工程与生物技术学院
  • 出版日期:2011-05-15 发布日期:2011-04-11
  • 基金资助:
    天津市农业科技成果与转化项目(0502160)

Optimization of Fermentation Conditions of Extruded Rice Bran for Production of γ-Aminobutyric Acid

YANG Ye,CHEN Ye*,LUO Yin,LI Xiu-ming,ZHENG Xiao-chen   

  1. College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
  • Online:2011-05-15 Published:2011-04-11

摘要: 米糠经双螺杆挤压机挤压处理后作为原料,以米曲霉为菌种,采用液体和固体两种发酵方法生产γ-氨基丁酸(GABA),研究米糠挤压处理工艺对GABA产量的影响。结果表明:米糠经不同挤压条件处理后进行发酵生产,其产物中γ-氨基丁酸的含量也不同。米糠的最适挤压处理条件为:物料米糠含水率20%、螺杆转速200r/min、挤压温度150℃,使用该条件处理得到的米糠进行发酵生产γ-氨基丁酸,液体发酵产物中γ-氨基丁酸含量为118.6mg/100g,固体发酵产物所得γ-氨基丁酸含量为121.1mg/100g。

关键词: 挤压, 米糠, γ - 氨基丁酸, 米曲霉, 发酵

Abstract: Extruded rice bran was used as raw materials to produceγ-aminobutyric acid (γ-GABA) by liquid- and solid-state fermentation using Aspergillus oryzae. The effect of extrusion conditions for rice bran on γ-GABA yield was explored. Different γ-GABA contents were found in fermentation broths of extruded rice bran obtained under different processing conditions. The optimal extrusion conditions for rice bran were water content of 20%, screw speed of 200 r/min and extrusion temperature of 150 ℃. Theγ-GABA contents in liquid- and solid-state fermentation products were 118.6 mg/100 g and 121.1 mg/100 g, respectively.

Key words: extrusion, rice bran, γ-aminobutyric acid, Aspergillus oryzae, fermentation

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