食品科学 ›› 2011, Vol. 32 ›› Issue (23): 225-228.doi: 10.7506/spkx1002-6630-201123045

• 生物工程 • 上一篇    下一篇

补料发酵枯草芽孢杆菌合成γ-聚谷氨酸的研究

吕 萌,梁金钟*,王风青   

  1. 黑龙江省高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
  • 出版日期:2011-12-15 发布日期:2011-12-21
  • 基金资助:
    黑龙江省高校科技创新团队建设计划资助项目(2010td04)

An Investigation and Comparison of Batch and Fed-batch Fermentation of Bacillus subtilis forγ-PGA Production

LU . . Meng,LIANG Jin-zhong*,WANG Feng-qing   

  1. (Helongjiang Provincal Key Laboratory of Food Science and Engineering, College of Food Engineering, Harbin University of Commerce, Harbin 150076, China)
  • Online:2011-12-15 Published:2011-12-21

摘要: 在5L自动发酵罐中,通过分批发酵和补料分批发酵,对枯草芽孢杆菌(Bacillus subtilis HCUL-B-115)生物合成γ-聚谷氨酸(γ-PGA)进行研究,以达到高产的目的。结果表明:在分批发酵过程中,在通入空气条件下搅拌转速由150r/min提高至250r/min,发酵结束时γ-PGA产量从11.30g/L提高到30.86g/L;在补料分批发酵过程中,在通入空气条件下,搅拌转速采用250r/min,当糖质量浓度在20g/L以下时,每次补加50mL 糖质量浓度200g/L的玉米糖化液则菌体大量生长,γ-PGA产量提高到52.20g/L。

关键词: 枯草芽孢杆菌, 转速控制, 分批发酵, 补料分批发酵, γ-PGA

Abstract: In this study, Bacillus subtilis was cultivated in a 5-liter fermentor to produce byγ-PGA by two different fermentation processes: batch fermentation and fed-batch fermentation. The results showed that increasing the agitation speed from 150 to 250 r/min could bring the yield ofγ-PGA to 30.86 g/L from 11.30 g/L in batch fermentation under ventilation conditions. Ventilation conditions and agitation at 250 r/min were also used in the fed-batch fermentation, and 50 mL of 200 g/L glucose was fed at a time when glucose concentration in fermentation broth was lower than 20 g/L, increasing the yield of γ-PGA to 52.20 g/L.

Key words: Bacillus subtilis, agitation, batch fermentation, fed-batch fermentation, γ-PGA

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