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
18°C optimal
10°C to 25°C range
Temperature range for optimal fermentation
Time
14 days
7 days – 30 days
Equipment