Description
Uncontrolled fermentation using ambient microbiota.
Technical
Relies on wild Saccharomyces and non-Saccharomyces yeasts (e.g., Brettanomyces, Pichia) alongside lactic acid bacteria. Sequential fermentation begins with oxidative yeasts (Hanseniaspora) followed by alcohol-tolerant strains.
Culinary Significance
Creates complex sour profiles essential for traditional lambic beers and natural wines, with terroir-specific microbial signatures.
Science
Primary Reaction
Lactic acid fermentation
Parameters
Temperature
15°C optimal
10°C to 28°C range
Time
1 year
3 months – 3 years
Equipment