what is draft beer

Draft beer is treated with strict sterility,make sure the liquor is free of any live yeast or other microorganisms,shelf life of up to six months to a year, also known as cold sterilization beer.Draft beer is a new beer product developed in recent decades, which aims to make beer taste fresh, pure and refreshing. Due to the continuous improvement of cold sterilization technology, the output of draft beer is increasing day by day, which has become one of the hot spots in the market competition of beer industry.

Quality requirements of draft beer: it has the same biological stability and non-biological stability as "cooked beer"; Keep beer fresh for a long time (flavor stability); Good aroma and taste, good body appearance and foaming property; Meet the requirements of physical and chemical indexes. That is, raw beer in addition to the use of non-thermal sterilization, other quality requirements and cooked beer the same.

The main problems in the production of draft beer are as follows: without thermal sterilization, the activity of protease A in beer still exists, which has A great influence on the foam of beer and leads to poor foam retention.

Measurement standard for draft beer: determination of sucrose invertase activity in beer. Generally, the activity of invertase in beer is destroyed after pasteurization or instant sterilization.