Nitrogen beer is not a black technology, the most representative is the Guinness beer that everyone usually drinks. Guinness has added a nitrogen ball to its aluminum canned beer. Usually there is a layer of film to seal, after the easy pull ring is opened, the nitrogen ball will immediately release nitrogen due to the pressure, thereby producing a sponge-like foam.
It is clear that the nitrogen foam will be more slender and will look more viscous, while the carbon dioxide foam will be sparser. Many people describe nitrogen foam with terms such as Creamy, while carbon dioxide foam generally only uses Cloudy. You can imagine how smooth the nitrogen foam. Since the beer fermentation process itself contains carbon dioxide, the current beer gas composition of nitrogen beer is 70% nitrogen + 30% carbon dioxide.
In fact, many wineries are not cold to nitrogen, because nitrogen gas is difficult to dissolve in water, so its durability will be shorter than that of carbon dioxide. For the bottled market, nitrogen has always been dedicated to draught beer (it is easier to store nitrogen in large barrels) due to inconvenient storage and other reasons. The Left Hand Brewing took the lead in breaking this deadlock. The Left Hand Brewery took the lead in using the word “nitro” on their bottled nitrogen beer in 2011. Unlike Guinness, they fill the bottle directly instead of using a nitrogen device. This unique technology and preconceived brand effect have made Left Hand a representative of nitrogen beer for a period of time. Of course, as the technology became more and more mature, many manufacturers began to make nitrogen bottled beer.
In addition to nitrogen, beer will also play “Cold Brew“, and this is called ice distillation. Ice distillation is a process of separating high-concentration alcohol-water mixtures by taking advantage of the higher freezing point of water than alcohol.
Alcohol extraction purity and temperature curve
The legend about ice distillation is that when a German worker was transporting wine in winter, the weather was too cold and the barrel burst because of the cold, so he laid a barrel lazily overnight outdoors. When everyone was found the next day, as punishment, the negligent person was asked to drink the remaining wine and found it sweet and delicious. Since then, ice distilled beer was born. The ice distillation method is basically the same as the ancient distillation method, but the equipment is better. After freezing the brewed wine, put it in a container and slowly separate the mixture of wine and water. The purity of the alcohol can be improved by multiple extractions, so a strong beer with a concentration of more than 50 will appear. The Scottish brewery Brewdog made a big publicity and went to Germany-ink the Bismarck