It is a natural preservation method that takes place in an anaerobic(oxygen-free) environment through lactic-acid fermentation. No vinegar or heat is used, only vegetables and a salt brine. The end result is delicious Sauerkraut, Kimchi (a favourite in Korea), and any combination of vegetables, an example of which is the Spanish blend known as Curtido
Fermentation is one of the oldest known methods of food preservation. There are however some important rules to ensure that the food ferments in a healthy way and does not form mould.
To safely ferment food you need to maintain an oxygen free environment. The Fermenta crock pot is specially designed with a barrier in the form of a gutter to keep oxygen out and to allow the naturally produced carbon dioxide to escape. After fitting the lid of your Fermenta, you fill the gutter with either water or oil to create the barrier.