食品科学 ›› 2009, Vol. 30 ›› Issue (4): 40-43.doi: 10.7506/spkx1002-6630-200904002

• 工艺技术 • 上一篇    下一篇

提高L- 谷氨酸产量的后期发酵工艺参数研究

冯志彬1,刘进杰1,王东阳2,缪 静1,屈慧鸽1,张玉香1,张 华3,丁 涓1   

  1. 1.鲁东大学生命科学学院 2.鄄城菱花味精股份公司 3.烟台南山学院
  • 收稿日期:2008-01-15 修回日期:2008-05-04 出版日期:2009-02-15 发布日期:2010-12-29
  • 通讯作者: 冯志彬 E-mail:fengzhibin257@163.com

Optimization of Culture Conditions for Post-biosynthesis of L-Glutamic Acid by Brevibacterium tianjinese S9114

FENG Zhi-bin1,LIU Jin-jie1,WANG Dong-yang2,MIAO Jing1,QU Hui-ge1,
ZHANG Yu-xiang1,ZHANG Hua3,DING Juan1   

  1. (1. College of Life Science, Ludong University, Yantai 264025, China;2. Linghua Courmet Co. Ltd., Juancheng 272000,
    China ;3. Yantai Nanshan University, Yantai 265706, China)
  • Received:2008-01-15 Revised:2008-05-04 Online:2009-02-15 Published:2010-12-29
  • Contact: FENG Zhi-bin1 E-mail:fengzhibin257@163.com

摘要:

以谷氨酸生产菌S9114 为供试菌株,利用50m3 发酵罐研究了L- 谷氨酸的发酵过程,确定发酵后期产酸速率过低是影响L- 谷氨酸产量的主要原因。优化发酵工艺的参数以提高L- 谷氨酸后期发酵的比产酸速率,结果表明:采用溶氧控制的葡萄糖流加方式,控制发酵后期的pH 值,在发酵的适当时期流加一定量的生物素和KCl 等措施可有效提高L- 谷氨酸的后期产酸水平。在最优条件下,单罐最高产量可达148g/L,糖酸转化率为60.5%。

关键词: L-谷氨酸, 生物素, 流加方式

Abstract:

The production process of L-glutamic acid by Brevibacterium tianjinese S9114 was investigated and the main affecting factors of post-biosynthesis of L-glutamic acid were investigated. The results showed that DO-control pulse fed-batch, and feeding of 2 μg/L biotin and 3 g/L KCl are beneficial for L-glutamic acid production. Under these optimal conditions, L-glutamic acid productivity reaches 148 g/L and conversion rate of glutamic acid to glucose reaches 60.5%.

Key words: L-glutamic acid, biotin, feeding method

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