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MBAA TQ http://dx.doi.org/10.1094/TQ-53-3-0817-01  |  VIEW ARTICLE
PEER-REVIEWED PAPER
Quantification of Wort Homogeneity for Projecting the Evaporation of Dimethyl Sulfide in an Open, Discontinuous Boiling Process by Means of Direct Heating of the Wort Kettle

Benjamin Kloos (1) and Hans Scheuren (2). 1. Kitzmann Brewery, Erlangen, Germany. 2. Ingenieurbüro Dr.-Ing. Hans Scheuren, Bad Kreuznach, Germany.

Abstract
Wort boiling is used for the evaporation of unwanted aromatic components, above all the unwanted component dimethyl sulfide (DMS). The traditional method is open, discontinuous boiling through direct heating of the kettle. The overall evaporation required for a target concentration of DMS is calculable. However, the lack of homogeneity in the kettle results in strong deviations between projection and reality. This article determines the deviation by establishing the wort homogeneity via a homogeneity factor (ε). Based on trials in a brewery, the new method was tested and successfully confirmed. Thus, with the formulated projection every brewery using an open, discontinuous wort boiling can be managed more efficiently than before.

Keywords: Evaporation, Homogeneity, Aromatic components, Overall evaporation, Dimethyl sulfide (DMS)