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Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
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A novel downstream process for 1,3-propanediol from glycerol-based fermentation.

Pinki Anand1, Rajendra Kumar Saxena, Ruchi G Marwah

  • 1Department of Microbiology, University of Delhi South Campus, New Delhi, India. pinkianand@gmail.com

Applied Microbiology and Biotechnology
|March 2, 2011
PubMed
Summary

This study presents an efficient method for purifying 1,3-propanediol from fermentation broth using microfiltration, charcoal treatment, vacuum distillation, and chromatography. The developed process achieves a high overall yield of 75.47% for this valuable chemical.

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Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Biochemical Engineering

Background:

  • Glycerol fermentation is a key biotechnological route for producing 1,3-propanediol.
  • Purification of 1,3-propanediol from complex fermentation broths presents significant challenges.
  • Efficient downstream processing is crucial for the economic viability of bio-based 1,3-propanediol production.

Purpose of the Study:

  • To investigate and develop an effective downstream process for purifying 1,3-propanediol (1,3-PDO) from glycerol-based fermentation broth.
  • To optimize a multi-step purification strategy combining physical and chemical separation techniques.
  • To achieve a high yield and purity of 1,3-propanediol suitable for industrial applications.

Main Methods:

  • Microfiltration using hollow fiber cartridges to remove biomass.
  • Activated charcoal treatment for decolorization and removal of soluble proteins.
  • Vacuum distillation to concentrate the product and induce crystallization of inorganic salts.
  • Gradient chromatography with silica gel as the stationary phase and a chloroform-methanol mobile phase for final purification.

Main Results:

  • Microfiltration removed 98.7% of biomass.
  • Activated charcoal treatment reduced soluble proteins to 0.1 g/L (96.0% removal).
  • Chromatography achieved an 89% yield of 1,3-propanediol with optimal parameters.
  • The overall yield of purified 1,3-propanediol using the developed procedure was 75.47%.

Conclusions:

  • The combined process of microfiltration, charcoal treatment, vacuum distillation, and silica gel chromatography is a simple, rapid, and efficient method for 1,3-propanediol purification.
  • This downstream process effectively removes impurities like biomass, proteins, and salts, leading to high product recovery.
  • The developed method offers a viable solution for the industrial-scale purification of bio-based 1,3-propanediol.