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Solid substrate fermentation of leached beet pulp withTrichoderma aureoviride.

A Illanes1, G Aroca, L Cabello

  • 1Biochemical Engineering School, Universidad Católica de Valparaiso, Av. Brasil 2950, 4059, Casilla, Valparaiso, Chile.

World Journal of Microbiology & Biotechnology
|January 16, 2014
PubMed
Summary
This summary is machine-generated.

A mutant strain of Trichoderma aureoviride significantly enhanced cellulase production on leached beet pulp. This optimized process shows potential for industrial-scale applications in enzyme and protein enrichment.

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Area of Science:

  • Biotechnology
  • Enzyme Technology
  • Microbial Fermentation

Background:

  • Leached beet pulp is a promising substrate for microbial fermentation.
  • Cellulases are crucial enzymes for biomass degradation.
  • Optimizing enzyme production is key for industrial applications.

Purpose of the Study:

  • To optimize cellulase production using native and mutant strains of Trichoderma aureoviride.
  • To evaluate the effectiveness of leached beet pulp as a substrate.
  • To assess the potential for protein enrichment of the residual solid.

Main Methods:

  • Solid-substrate fermentation in column-type fermenters.
  • Controlled temperature and aeration rate.
  • Comparison of native, mutant, and reference strains of Trichoderma aureoviride.
  • Use of raw and acid pre-treated leached beet pulp.

Main Results:

  • A mutant strain achieved optimal cellulase production, yielding 11 and 29 filter paper units/g solids on raw and acid pre-treated pulp, respectively.
  • The mutant strain's production was 40% higher than the native strain and 70% higher than the reference strain.
  • Significant protein enrichment of residual solids, reaching up to 40% of total dry weight, was observed.

Conclusions:

  • Mutant strains of Trichoderma aureoviride offer superior cellulase production on leached beet pulp.
  • Acid pre-treatment of leached beet pulp enhances enzyme yield.
  • The process is suitable for scale-up to pilot level, with potential for co-production of enzymes and protein-rich biomass.