Description
Lactic acid bacteria and yeast symbiotically ferment rye bread sugars into a tangy, effervescent drink.
Technical
Saccharomyces cerevisiae and Lactobacillus species convert maltose from hydrolyzed bread starch into lactic acid (0.3-0.6% w/v), ethanol (0.5-1.2% ABV), and CO2 through heterolactic fermentation, with Maillard reaction products from toasted bread contributing melanoidins.
Culinary Significance
Transforms food waste into a probiotic beverage with distinctive sourdough-like flavor, used as both a refreshing drink and soup base.
Science
Primary Reaction
Heterolactic fermentation (phosphoketolase pathway)
Parameters
Temperature
20°C optimal
16°C to 25°C range
Time
48 hours
36 hours – 5 days
Equipment
Earthenware crock or food-grade plasticCheesecloth/mesh bag for breadpH meter (optional)