Krones Boreas wort-stripping system

Boreas is a solution for the beer-brewing process for controlled evaporation of unwanted aromatics from the hot wort.

Leaving the ‘good’ aromatics in the beer, while taking the ‘bad ones’ out, the system also enables the brewing process to be optimised in terms of energy consumption - either by a temporal or qualitative reduction in overall evaporation or by downsizing the wort boiling time and removing the unwanted aromatic compounds. The process controls the expulsion of these aromatics, particularly the leading substance dimethyl sulphide (DMS), without having to change the brewing process or react to increased DMS values with longer boiling times. DMS is regarded as the cause of the ‘celery taste’ that is not acceptable for beer. The desirable aromatics, by contrast, particularly the important hop aromatics, are hardly influenced by this wort-stripping process at all and, if so, in most cases for the better.

Due to high-precision control of the evaporation efficiency, the minimised footprint and the stand-alone construction, the wort-stripping system provides an attractive option for both large and mid-tier breweries that can be simply integrated into any existing brewhouse.

Features include easy retrofittability and a mode of operation that does without vacuum or additional thermal energy. Depending on the starting level involved, Boreas enables DMS reduction rates of up to 70%.