Sour beers and methods of their production have been known for hundreds of years. This process is based on spontaneous fermentation carried out mainly by species of microorganisms such as Lactobacillus, Pediococus or Brettanomyces. These microorganisms are able to synthesize metabolites that lower the pH of the wort and give the finished product the desired sensory characteristics characteristic of a given beer style. Brewing of sour beers leads to contamination of the whole equipment used brewery microorganisms, and sterilization and disinfection is difficult and expensive from a technological point of view. The production of sour beers is also time-consuming and the end result is uncertain, which makes the final price of the product is prohibitive, but it does not discourage connoisseurs. Lite uniqueness of these beers causes an increase in demand over the last years.