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Related Experiment Videos

Riboflavin production by Aspergillus terreus from beet-molasses

S A Sabry1, K M Ghanem, H A Ghozlan

  • 1Department of Botany and Microbiology, Faculty of Science, Alexandria University, Egypt.

Microbiologia (Madrid, Spain)
|December 1, 1993
PubMed
Summary

This study optimized riboflavin (vitamin B2) production using Aspergillus terreus and beet molasses. Maximum yield was achieved with specific nutrient concentrations and pH, highlighting optimal conditions for fungal vitamin synthesis.

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Area of Science:

  • Microbiology
  • Biotechnology
  • Biochemistry

Background:

  • Riboflavin (vitamin B2) is an essential nutrient with various industrial applications.
  • Fungal fermentation offers a sustainable route for vitamin production.
  • Optimizing culture conditions is crucial for maximizing microbial yields.

Purpose of the Study:

  • To determine the optimal culture medium composition for riboflavin production by Aspergillus terreus.
  • To identify the ideal growth phase for maximal vitamin B2 yield.

Main Methods:

  • Aspergillus terreus was cultured in a medium primarily using beet molasses as the carbon source.
  • Various nutrient components (L-asparagine, MgSO4.7H2O, K2HPO4/kH2PO4) and initial pH were tested.
  • Riboflavin yield was assessed at different growth stages, specifically targeting the late exponential phase.

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Main Results:

  • Beet molasses as the sole carbon source supported fungal growth and riboflavin production.
  • Optimal conditions included 90 g/l centrifuged beet molasses, 1 g/l L-asparagine, 0.5 g/l MgSO4.7H2O, and 5 g/l K2HPO4/kH2PO4 (1:1).
  • The highest riboflavin yield was observed in 16-day-old cultures with the medium initially adjusted to pH 8.

Conclusions:

  • The study successfully identified optimal parameters for enhanced riboflavin production using Aspergillus terreus.
  • Beet molasses is a viable and cost-effective carbon source for industrial vitamin B2 synthesis.
  • The findings provide a foundation for scalable and efficient fungal-based riboflavin manufacturing.