Pasteur's finding showed that there are two types of fermentation: alcoholic and lactic acid. Alcoholic fermentation occurs by the action of yeast; lactic acid fermentation, by the action of bacteria.

This is an important distinction: These two types of fermentation require different temperatures and different types of yeast, and the final product typically comes out tasting slightly different ...

Fermentation is a complex process where microorganisms like yeast and bacteria break down carbohydrates, such as sugars, ...