食品科学 ›› 2013, Vol. 34 ›› Issue (21): 168-171.doi: 10.7506/spkx1002-6630-201321035

• 生物工程 • 上一篇    下一篇

γ-聚谷氨酸发酵液预处理的研究

梁金钟,张露露,王风青   

  1. 黑龙江省高等学校食品科学与工程重点实验室,哈尔滨商业大学食品工程学院,黑龙江 哈尔滨 150076
  • 收稿日期:2013-06-19 修回日期:2013-10-08 出版日期:2013-11-15 发布日期:2013-10-28
  • 通讯作者: 梁金钟 E-mail:138687412@qq.com
  • 基金资助:

    “十二五”国家科技支撑计划项目(2012BAD32B08)

Pretreatment of Fermented Mash Containing Poly-γ-glutamic acid (γ-PGA)

LIANG Jin-zhong,ZHANG Lu-lu,WANG Feng-qing   

  1. Key Laboratory of Food Science and Engineering, College of Food Engineering, Harbin University of Commerce, Harbin 150076, China
  • Received:2013-06-19 Revised:2013-10-08 Online:2013-11-15 Published:2013-10-28
  • Contact: LIANG Jin-zhong E-mail:138687412@qq.com

摘要:

为了提高γ-聚谷氨酸(γ-PGA)的质量,基于γ-PGA发酵液的物化特性,采用单因素试验逐个确定影响硅藻土除杂质的因子的最佳条件,最后在单因素试验的基础上用硅藻土层模拟板框模式过滤除菌体。以除菌率、杂蛋白质量浓度、γ-PGA质量浓度为指标,研究硅藻土的用量。结果表明:发酵液加热至50℃,4倍稀释,以1.6cm厚(约25g)的硅藻土层作为滤饼层,连续过滤4次后,能除去130mL原发酵液中几乎全部的菌体,发酵液中蛋白质质量浓度为0.32mg/mL,γ-PGA的损失率为34.8%。

关键词: &gamma, -聚谷氨酸(&gamma, -PGA);硅藻土;除菌体

Abstract:

In order to improve the quality of poly-γ-glutamic acid (γ-PGA), single factor experiments were used to determine
the best conditions for removing bacterial cells through diatomite, based on the physical and chemical properties of fermented
mash containing γ-PGA. The amount of diatomite was determined based on bacterial removal, protein concentration, γ-PGA
concentration. The results showed that when the fermented mash was heated at 50 ℃, diluted 4-fold and then filtered through 1.6
cm thickness (approximately 25 g) diatomite four times, the bacterial cells were almost completely removed from 130 mL of γ-PGA
fermented mash. The protein concentration was 0.32 mg/mL, and the loss of γ-PGA was 34.8%.

Key words: poly-&gamma, -glutamic acid (&gamma, -PGA);diatomite;bacterial cells

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