(1)Gelatinizing tank,mash tank, filter tank and boiling tank all adopt closed round manhole. The manhole door must be closed in the production process to reduce the oxygen dissolution in the process of process operation as much as possible. (2)The inlet pipe of the mash and wort should be located at the bottom of the tank to reduce the contact between the mash and wort and oxygen during transportation. (3)The mash mixing times should be reduced and the mixing time should be shortened to avoid the mash forming vorticity and inhaling a large amount of air.

Aeration of cold wort seems to be a very simple process, but the way of aeration of wort and the control of aeration of wort are crucial to the normal fermentation of yeast, smooth production process, quality stability and flavor characteristics of beer products. If the oxygen is not properly filled, it will cause a series of changes in the fermentation process, and even lead to bad fermentation results and flavor defects.