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Biotechnology Letters

, Volume 40, Issue 5, pp 781–788 | Cite as

A novel strategy for production of ethanol and recovery of xylose from simulated corncob hydrolysate

  • Jinfeng Sun
  • Jie Wang
  • Kangming Tian
  • Zixing Dong
  • Xiaoguang Liu
  • Kugenthiren Permaul
  • Suren Singh
  • Bernard A. Prior
  • Zhengxiang Wang
Original Research Paper
  • 223 Downloads

Abstract

Objectives

To develop a xylose-nonutilizing Escherichia coli strain for ethanol production and xylose recovery.

Results

Xylose-nonutilizing E. coli CICIM B0013-2012 was successfully constructed from E. coli B0013-1030 (pta-ack, ldhA, pflB, xylH) by deletion of frdA, xylA and xylE. It exhibited robust growth on plates containing glucose, arabinose or galactose, but failed to grow on xylose. The ethanol synthesis pathway was then introduced into B0013-2012 to create an ethanologenic strain B0013-2012PA. In shaking flask fermentation, B0013-2012PA fermented glucose to ethanol with the yield of 48.4 g/100 g sugar while xylose remained in the broth. In a 7-l bioreactor, B0013-2012PA fermented glucose, galactose and arabinose in the simulated corncob hydrolysate to 53.4 g/l ethanol with the yield of 48.9 g/100 g sugars and left 69.6 g/l xylose in the broth, representing 98.6% of the total xylose in the simulated corncob hydrolysate.

Conclusions

By using newly constructed strain B0013-2012PA, we successfully developed an efficient bioprocess for ethanol production and xylose recovery from the simulated corncob hydrolysate.

Keywords

Escherichia coli Ethanol Simulated corncob hydrolysate Xylose recovery 

Notes

Acknowledgements

This research was supported financially by The Raising Program of Innovation Team for Tianjin Universities (TD12-5002).

Supporting information

Supplementary Table 1—Primers used in this study.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10529_2018_2537_MOESM1_ESM.docx (13 kb)
Supplementary material 1 (DOCX 13 kb)

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Biotechnology, Center for Bioresource and BioenergyJiangnan UniversityWuxiChina
  2. 2.Department of Biological Chemical Engineering, College of Chemical Engineering and Materials ScienceTianjin University of Science and Technology, TEDATianjinChina
  3. 3.School of Life Science and Food EngineeringHuaiyin Institute of TechnologyHuaianChina
  4. 4.Department of Biotechnology and Food TechnologyDurban University of TechnologyDurbanSouth Africa
  5. 5.Department of MicrobiologyStellenbosch UniversityMatielandSouth Africa

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