JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 32 Issue 4
July 2017
Article Contents
ZHAO Xiao-hang, SHEN Ya-peng, LIU Pei-yang, et al. Condition of variable temperature fermentation of poly-γ-glutamic acid production by B.amyloliquefaciens YP-2[J]. Journal of Light Industry, 2017, 32(4): 30-36. doi: 10.3969/j.issn.2096-1553.2017.4.005
Citation: ZHAO Xiao-hang, SHEN Ya-peng, LIU Pei-yang, et al. Condition of variable temperature fermentation of poly-γ-glutamic acid production by B.amyloliquefaciens YP-2[J]. Journal of Light Industry, 2017, 32(4): 30-36. doi: 10.3969/j.issn.2096-1553.2017.4.005 shu

Condition of variable temperature fermentation of poly-γ-glutamic acid production by B.amyloliquefaciens YP-2

  • Received Date: 2017-03-05
    Available Online: 2017-07-15
  • The effects of constant temperature fermentation time on poly-γ-glutamic acid (γ-PGA) production by B.amyloliquefaciens YP-2 was investigated under different temperatures (31 ℃, 33 ℃, 35 ℃, 37 ℃ and 39 ℃). The scheme of step-wise temperature control (0~4 h, 35 ℃; 4~7 h, 31 ℃; 7~10 h, 33 ℃;10~26 h, 37 ℃;26~60 h,31 ℃) was formulated following the kinetic analysis of γ-PGA fermentation. Under the variable temperature fermentation condition, the maximum cell productivity and γ-PGA yield reached 1.66 g/(L·h)-1 and 29.50 g/L, respectively, which was 4.4% and 11.8% higher than those in optimal constant temperature at 37 ℃. The results indicated the variable temperature fermentation effectively improved the γ-PGA production by B.amyloliquefaciens YP-2 comparing with constant temperature fermentation.
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