Views: 54 Author: Site Editor Publish Time: 2023-01-03 Origin: Site
As we all know, to ensure the quality of craft beer, in addition to choosing high-quality brewing equipment, it is also inseparable from rigorous and meticulous technological processes. Every step of beer brewing must not be missed, and the filling process is even more critical, because if this step cannot reduce the absorption of oxygen, then the previous efforts to avoid oxygen will be in vain. Today we will talk about how to reduce dissolved oxygen when filling craft beer.
There are generally three main ways to reduce dissolved oxygen in beer.
One is to vacuum, which removes the air from the bottle.
The second is the carbon dioxide back pressure. The carbon dioxide gas under pressure enters the bottom of the bottle through the catheter to drive out the air in the bottle.
The third is to use a foaming device. Before the bottle is capped, a very fine high-temperature sterile water flow is continuously sprayed downward through a micro-hole nozzle, which stimulates the surface of the beer to quickly foam and rush to the bottle mouth. The carbon dioxide escaping from the foam and beer pushes the air from the neck of the bottle out of the mouth of the bottle. Immediately afterwards, the bottle is quickly sealed with a gland.
In addition, there are two other ways to reduce dissolved oxygen.
One is the inert gas protection method. Firstly, inert gas is used instead of CO2 to flush the empty bottle, which saves CO2 gas; secondly, inert gas is used to flush the neck of the beer bottle on the way to the capping machine, making it difficult for beer to inhale oxygen. This is very common in brewery applications. If the empty bottle is flushed with high-temperature saturated steam, coupled with vacuum and inert gas protection, the oxygen absorption of beer can be reduced to 0.02mg/L, which can basically meet the requirements of anaerobic filling.
The second is the air combustion method. When the empty bottle is connected to the filling machine, try to fill the empty bottle with a certain amount of flammable gas (such as H2), and use a laser to ignite the mixed gas in the bottle to make it explode slightly and consume oxygen.