啤酒的喷涌及预防

啤酒的喷涌指包装啤酒(瓶装或罐装)开盖后二氧化碳突然冒出，引起大量很细的泡沫溢出，导致泡沫状啤酒流出容器之外。影响啤酒喷涌的因素有：原料、酒花、草酸钙结晶、金属离子、肽及含肽物；影响喷涌强度的因素包括：搅动与振荡、温度、容器、二氧化碳、瓶颈空气；预防啤酒喷涌的方法：选用优质原料、尽量杜绝金属离子进入啤酒、采取沉淀或溶解法除去啤酒中草酸钙结晶、使用抗氧化剂除去啤酒中溶解氧、减少瓶颈空气含量和正确运输、贮存及装卸。

Beer-Spewing and Its Prevention

Sudden spewing of CO2 at the moment of cap opening of packed beer (bottled beer or tinned beer) led to the overflow of large amount of foam. Then foamy beer flew out of containers. Such phenomenon was named beer-spewing. The factors influencing beer spewing covered raw materials, hops, calcium oxalate, metal ions, peptide and peptide containing substance. The factors influencing beer-spewing intensity included stirring and shaking, temperature, containers, CO2, bottleneck air. The methods to prevent beer-spewing were as follows: selection of quality raw materials; exclusion of the entry of metal ions into beer; elimination of calcium oxalate by precipitation method or solution method; elimination of dissolved oxygen in beer by use of antioxidant; reduce of bottle neck air; and proper transportation, storage and loading and unloading.