Presenter: Andreas Gahr, Hopfenveredlung St. Johann GmbH
& Co. KG, Train-St. Johann, Germany
Coauthor: Adrian Forster, HVG Hopfenverwertungsgenossenschaft
e.G., Wolnzach, Germany
Due to the huge demand, especially in craft brewing, more and
more Cascade hops are grown in the United States and the high
alpha market stagnates. So, other hop growing areas are looking
for diversification. In 2012 German farmers harvested 6.1 tons
of Cascade without hardly any knowledge of the comparability
of their crop. The commonalities and differences of Cascade
hops of different origin found in this work are presented.
Cascade hops of U.S. and Hallertau origin were analyzed for
bitter and especially aroma components, as well as for total and
low molecular weight polyphenols, and used for all malt lager
brewing trials. The single-variety brews focused on hop-derived
sensory properties such as bitterness, late-hop, and dry-hop
aroma. Analytical values were assessed and compared as well
in order to obtain information about transfer rates of hop aroma
compounds and polyphenols. Furthermore, some tests describe
the losses of some individual aroma components during beer
storage.
Andreas Gahr was trained on the job as a brewer and maltster
at the Augustiner Brewery, Munich, Germany. He received
a brewmaster degree from the Technical University Munich-
Weihenstephan in 1994 and worked for another four years at
the university for the Chair of Brewing Technology I. Since
1998 Andreas has been the head of the Research Brewery
St. Johann, which belongs to the hop processing company
Hopfenveredlung St. Johann GmbH & Co. KG and deals
with all kinds of hop-related brewing trials and product
development, as well as technological and raw material trials
for suppliers and the entire brewing industry. Together with
his co-authors he received the MBAA Inge Russell Best Paper
Award in 2010.
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