Liquid nitrogen is used for cooling, freezing, modified atmosphere packaging and inerting. In cooling and freezing processes the high vaporization temperature of liquid nitrogen is used to quickly cool and freeze food.
In food packaging, nitrogen gas is used to eliminate the oxygen in the atmosphere, thus minimizing the growth of micro-organisms and the oxidation of fat.
In the storing and bottling of wines and oils, nitrogen is used as an inert gas to eliminate oxidation and extend the shelf-life of the products.
