Presenter: Tobias Becher, Ziemann International GmbH, Ludwigsburg,
Germany
Coauthor: Klaus Wasmuht, Ziemann International GmbH,
Ludwigsburg, Germany
Modern wort boiling systems must work with individual
process recipes, which can be divided into three phases:
heating, simmering, and evaporating. To provide these three
phases, an internal calandria usually relies on additional
wort circulation pumps. Otherwise a huge effort is necessary
for cleaning if the boiling time is increased and heat supply
is damped down. The innovative design introduced here
provides a solution without such disadvantages. It consists
of two interconnected heating segments, each of which
can be activated separately. The two segments reflect three
boiling phases. The essential function is achieved by means
of Venturi effects. The required product circulation can be
combined with the lowest possible heat supply. The heating
segment in use always operates in optimum heating-flow
conditions. Simmering can be introduced as a rediscovered
procedure. A series of tests was performed in a pilot brewery
to prove functionality. In 2013 two breweries with a cast
out wort of approximately 80 bbl successfully installed the
novel equipment. Using the same occupancy time, a lower
evaporation rate can be achieved, the tendency to fouling can
be reduced, and thus, product quality (TBI, free DMS, DMS
precursor, protein fractions, aroma profile) can be maintained.
Moreover, an efficient use of energy can be achieved. The
presentation describes the novel calandria design, the respective
process technology, and the technological results in practice.
Tobias Becher graduated as a diploma engineer of brewing
science and beverage technology in 2001 from the Technical
University of Munich in Freising-Weihenstephan (Germany).
He apprenticed as a brewer and maltster before, worked
afterward as a process engineer for beer filtration systems, and
later worked as a technical consultant for environmental issues
in the brewing sector. Since 2005 he has been employed by
Ziemann. Today he is head of research and development within
the Process Technology Division at Ziemann International
GmbH (Germany).
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