Continuous bioconversion of 2-phenylethanol by yeast resting cells coupled within situ product removal technique

  • HUANG Xiao-ping ,
  • LIU Lan ,
  • XIONG Da-wei ,
  • et al.
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  • (Institution of Microbiology, Jiangxi Academy of Sciences, Nanchang 330029, China)

Received date: 2018-05-15

  Revised date: 2018-05-29

  Online published: 2018-11-23

Abstract

Using the yeast resting cells and macroporous adsorptive resins respectively as enzyme carriers and separation medium, continuous transformation of 2-phenylethanol was carried out with the aid of in situ product removal techniques. Meanwhile, the strains were separated through microfiltration membrane. The transformation conditions were optimized in 5 L fermentor, and continuous bioconversion of 2-phenylethanol was fulfilled by feeding and controlling product concentration. The concentration of 2-phenylethanol was 24.06 g/L after running 144 h in single tank. The molar conversion rate was 79.34 %, and the average space-time yield was 0.166 g/(L·h). After running 144 h in double tanks, the concentration of 2-phenylethanol reached 29.86 g/L, which was higher than single tank production by 24.1%. The molar conversion rate and the average space-time yield were up to 81.83 % and 0.204 6 g/(L·h), respectively. After repeated use of resting cells for 10 times, the production and average conversion rate of 2-PE did not decrease obviously.

Cite this article

HUANG Xiao-ping , LIU Lan , XIONG Da-wei , et al. . Continuous bioconversion of 2-phenylethanol by yeast resting cells coupled within situ product removal technique[J]. Food and Fermentation Industries, 2018 , 44(10) : 20 -24 . DOI: 10.13995/j.cnki.11-1802/ts.017601

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