Revitalising Brewers' Spent Grains and Enriching With Biogenic Compounds Through the Fermentation of Fructophilic Lactic Acid Bacteria and Yeasts
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View abstract on PubMed
Summary
This summary is machine-generated.Fermenting brewer's spent grain (BSG) with Fructobacillus fructosus and Wickerhamomyces anomalus enriches its bioactive compounds. This process enhances antioxidant and skin-protective properties, demonstrating BSG valorization potential.
Area Of Science
- Food Science
- Microbiology
- Biotechnology
Background
- Brewer's spent grain (BSG) is a major byproduct of the brewing industry with environmental concerns.
- BSG possesses significant nutritional and functional potential for valorization.
- Non-conventional microbial starters can be explored for BSG biotransformation.
Purpose Of The Study
- To investigate the potential of Fructobacillus fructosus PL22 and Wickerhamomyces anomalus GY1 to ferment BSG.
- To enrich BSG with bioactive compounds through fermentation.
- To evaluate the impact of fermentation on the functional properties of BSG.
Main Methods
- Fermentation of BSG using F. fructosus PL22 and W. anomalus GY1.
- Analysis of microbial metabolites, peptides, amino acids, and phenolic compounds.
- Assessment of antifungal, antioxidant, and skin-related properties (keratinocyte proliferation, FLG gene expression, wound healing).
Main Results
- Fermentation by both starters released key microbial metabolites like lactic acid, acetic acid, and ethanol.
- W. anomalus significantly enhanced the release of specific amino acids (Ala, Cys, GABA) and health-promoting phenolic compounds.
- Fermented BSG exhibited enhanced antifungal and antioxidant activities, promoting human keratinocyte proliferation and filaggrin gene expression, indicating improved skin protection and wound healing.
- Both starters increased unique peptide generation, with F. fructosus yielding one previously identified antioxidant peptide.
Conclusions
- Fermentation by F. fructosus and W. anomalus effectively valorizes BSG by enriching its bioactive compound profile.
- The enhanced bioactive profile translates to improved antioxidant and skin-protective functionalities.
- This study demonstrates the potential of microbial fermentation to repurpose BSG, enhancing its nutritional value and creating multifunctional ingredients.
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