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Ethanol fermentation integrated with PDMS composite membrane: An effective process.

Chaohui Fu1, Di Cai1, Song Hu1

  • 1National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.

Bioresource Technology
|November 10, 2015
PubMed
Summary
This summary is machine-generated.

This study shows polydimethylsiloxane (PDMS) membranes effectively separate ethanol. Integrating PDMS membranes with fermentation enhances ethanol production, offering an eco-friendly and energy-saving process.

Keywords:
Ethanol fermentationPDMS membranePervaporationProcess integration

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Area of Science:

  • Chemical Engineering
  • Biotechnology

Background:

  • Ethanol production via fermentation is crucial but often limited by product inhibition.
  • Efficient separation of ethanol is key to improving fermentation performance and yield.

Purpose of the Study:

  • To investigate the efficacy of polydimethylsiloxane (PDMS) membranes for ethanol separation.
  • To evaluate the integration of PDMS membrane pervaporation with ethanol fermentation processes.
  • To assess the performance of fed-batch and continuous fermentation coupled with pervaporation.

Main Methods:

  • Preparation of polydimethylsiloxane (PDMS) membranes in an aqueous phase.
  • Testing membrane performance in separating ethanol from model ethanol/water mixtures.
  • Implementing and studying integrated fermentation-pervaporation systems (batch, fed-batch, continuous).

Main Results:

  • PDMS membranes demonstrated effective separation of ethanol from model solutions.
  • Integrated fermentation-pervaporation significantly enhanced ethanol productivity compared to conventional methods.
  • Fed-batch and continuous systems achieved high total flux (332.4–663.7 g/m²h) and separation factors (8–11.7).
  • High ethanol titers (up to ~446.3 g/L) were obtained on the permeate side.

Conclusions:

  • The integrated PDMS membrane pervaporation and fermentation process is a viable and efficient method for ethanol production.
  • The developed process is environmentally friendly and energy-saving.
  • This technology shows promising long-term operational potential for industrial ethanol production.