process in the production of beer

Brewing is the process of making beer. It is usually made in a brewery, though it can be made at home.[1] It is made by adding bacteria that ferment malt, barley or sugar into a large vat. Ethanol is produced by bacteria using up the energy from the mixture (which the bacteria digest into glucose) because there is no oxygen in the vat.


  1. Lewis, Michael J.; Young, Tom W. (2002). Brewing. Springer Science & Business Media. ISBN 978-0-306-47274-9.