First, the definition of beer "top"Sometimes, after drinking beer, people will have a "headache" phenomenon, commonly known as "up head", "up head" is a physiological reaction of the human body, and there are many reasons for "up head" after drinking, but beer is in the fermentation process. The tra

In the process of beer brewing, the invasion of heterogeneous microorganisms is inevitable. The growth and reproduction of these microorganisms make use of wort (very good medium) or nutrients in beer, resulting in difficulties or abnormality in subsequent production, resulting in precipitation, pre