High Gravity Blending (HGB)
HGB is a concise expression for adjustment of the desired original gravity by means of adding degassed water to high gravity beer. The original designation HGB stems from production of worts above 13 %. There used to be no distinction between worts over 12 % (HG high gravity worts) and 18 % (VHG very high gravity worts) (1). The modified technology is also called HGP (high gravity processing) (2). This kind of brewing process originated in the United States and from there it spread around the world. Today, this technique is a procedure used everywhere for the economic production of beer, making optimum use of existing plant capacities.
Almost all big brewers use these techniques which are an integral part of the process. Then the amount of water to be added can be calculated....
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