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Related Experiment Videos

Yeast production from virgin grape marc.

R B Lo Curto1, M M Tripodo

  • 1Department of Organic and Biological Chemistry, University of Messina, Italy. rlocurto@isengard.unime.it

Bioresource Technology
|March 27, 2001
PubMed
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Virgin grape marc (VGM) can be used to produce valuable yeast biomass through fed-batch fermentation. This sustainable method offers an alternative to traditional sugar sources, yielding yeast comparable in quality to those from molasses.

Area of Science:

  • Biotechnology
  • Food Science
  • Sustainable Chemistry

Background:

  • Grape marc, a byproduct of winemaking, is often underutilized.
  • Traditional fermentation processes primarily focus on ethanol production or waste disposal.
  • There is a need for sustainable valorization of agricultural byproducts.

Purpose of the Study:

  • To investigate the potential of virgin grape marc (VGM) as a substrate for single-cell protein (SCP) production using Saccharomyces cerevisiae.
  • To evaluate the feasibility of producing high-value yeast biomass from VGM through fermentation.
  • To compare the productivity and quality of yeast derived from VGM with those from conventional sources like molasses.

Main Methods:

  • Extraction of a sugar-rich solution from fresh grape marc.

Related Experiment Videos

  • Fed-batch fermentation of the extracted VGM solution using Saccharomyces cerevisiae.
  • Analysis of yeast biomass productivity and quality.
  • Main Results:

    • A simple extraction method yields a sugar-rich solution from grape marc.
    • Fed-batch fermentation of VGM enables the production of high-value yeast biomass.
    • Yeast productivity and quality from VGM are comparable to those obtained from molasses.

    Conclusions:

    • Virgin grape marc presents a viable and sustainable alternative substrate for yeast biomass production.
    • This approach offers significant economic and environmental benefits, particularly in grape-producing regions with limited access to traditional sugar sources.
    • The valorization of VGM into SCP contributes to a circular economy in the agri-food industry.