SCI和EI收录∣中国化工学会会刊

›› 2011, Vol. 19 ›› Issue (4): 682-686.

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Salting-out Extraction of 2,3-Butanediol from Jerusalem artichoke-based Fermentation Broth

戴建英, 张媛丽, 修志龙   

  1. School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China
  • 收稿日期:2011-01-18 修回日期:2011-04-04 出版日期:2011-08-28 发布日期:2011-08-28
  • 通讯作者: XIU Zhilong,E-mail:zhlxiu@dlut.edu.cn
  • 基金资助:
    Supported by the National High Technology Research and Development Program of China (2009AA05Z443)

Salting-out Extraction of 2,3-Butanediol from Jerusalem artichoke-based Fermentation Broth

DAI Jianying, ZHANG Yuanli, XIU Zhilong   

  1. School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China
  • Received:2011-01-18 Revised:2011-04-04 Online:2011-08-28 Published:2011-08-28
  • Supported by:
    Supported by the National High Technology Research and Development Program of China (2009AA05Z443)

摘要: The removal of solid impurities and separation of target products from a fermentation broth is becoming more tedious with the utilization of lignocelluloses as source of substrate.2,3-Butanediol, an important chemical used widely is also a main product of sugar-based fermentation carried out by Klebsiella pneumoniae.In this study, we investigated the use of salting-out extraction(SOE) that employed a K2HPO4/ethanol system consisting of 21% ethanol and 17% K2HPO4(mass fraction) to separate 2,3-butanediol from the viscous Jerusalem artichoke-based fermentation broth.After SOE, about 98% of solid matters was removed, and the viscosity decreased from 72.5 mPa s in the original fermentation broth to 4.4 mPa s in the top phase.The partition coefficient and yield of 2,3-butanediol reached 13.4 and 99%, respectively, and 89% of soluble proteins was removed from the broth.The results showed that SOE is an efficient way for isolating 2,3-BD from a highly viscous fermentation broth by removing much of the solid matters within the broth.

关键词: 2,3-butanediol, Jerusalem artichoke, salting-out extraction, viscosity

Abstract: The removal of solid impurities and separation of target products from a fermentation broth is becoming more tedious with the utilization of lignocelluloses as source of substrate.2,3-Butanediol, an important chemical used widely is also a main product of sugar-based fermentation carried out by Klebsiella pneumoniae.In this study, we investigated the use of salting-out extraction(SOE) that employed a K2HPO4/ethanol system consisting of 21% ethanol and 17% K2HPO4(mass fraction) to separate 2,3-butanediol from the viscous Jerusalem artichoke-based fermentation broth.After SOE, about 98% of solid matters was removed, and the viscosity decreased from 72.5 mPa s in the original fermentation broth to 4.4 mPa s in the top phase.The partition coefficient and yield of 2,3-butanediol reached 13.4 and 99%, respectively, and 89% of soluble proteins was removed from the broth.The results showed that SOE is an efficient way for isolating 2,3-BD from a highly viscous fermentation broth by removing much of the solid matters within the broth.

Key words: 2,3-butanediol, Jerusalem artichoke, salting-out extraction, viscosity