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Zillertal opts for biogas
In the Austrian valley of
Zillertal, a biogas plant is
currently being established
with pre­shredding technology
by MeWa. The QZ has
convinced the experts in
test runs. Its new field
of application is now eagerly
anticipated.
The plant is expected to supply
the Zillertal biogas company, Bioenergie
Schlitters, 330 Kilowatts of
power from January 2008. For this purpose,
Finsterwalder Umwelttechnik GmbH has
designed a concept in which the QZ from
MeWa plays a crucial role. Around 6,000
tonnes of food waste, biowaste and outof-date
food are expected to be converted
into energy, waste water and compost in
the modern biogas plant in future.
The material from households and tourist
establishments in Zillertal must first
be broken down and the contraries in it
separated out. ”In this
respect the QZ has two
immediate advantages
over conventional cutting
systems“, says
Klemens Finsterwalder
from the german planning
agency FITEC. Firstly the machine can
process and separate metallic contraries
without any problem. For example, these are
often found in biowaste in the form of
cutlery from tourism businesses. But even
an axle from a biowaste bin or packaged
food are no problem for the QZ.
The particular benefit of the QZ is
shown by its chains when processing the
biomass. These open up the biomass in
such a way that a much larger surface
area is created compared with cut types of
biowaste. This gives the bacteria a much
larger surface area to attack during the
fermentation process. The principle is
comparable with that of a mortar, which
really allows the aromas to be released
from herbs. Experts are hoping for a usable
energy yield in future, which will beat
similar plants with conventional cutting
systems in the shredding sector by up to
30 per cent.
MeWa-News December 2007
“In this respect the QZ
has two immediate
advantages over
conventional cutting
systems.“
With its resources and the peasant
culture and tradition the Zillertal is
very popular with ecology-minded
tourists.
The contraries are separated at the
Schlitters plant in two stages. After shredding
in the QZ and again later during the
continuous fermenter cleaning process.
The conditioned organic remains are sanitised
in a double-tube heat exchanger after
shredding and added to the fermenter.
The process itself requires electrical and
thermal energy. These
are produced from
the biogas in a combined
heat and power
plant. The excess
energy is fed into the
public network in the
form of electricity. The heat is used for
heating and hot water production. The
fermentation remains are divided into
compost and raw sewage. ■
Schlitters
in the valley of Zillertal
Schlitters is a romantic, family-friendly
village at the entrance to the valley of
Zillertal. All those who care for fresh
mountain air and Alpine sports take
to the Zillertal and get inspired by the
valley’s scenic beauty and exhilarating
experience, the tourism association
promises. The small village with its
1,500 inhabitants offer not only onmountains
adventure for them who
loves to take the summit, but also
relief from the stress.
Market & trends
From January 2008 the fermenter delivers
nonpolluting energy.
Even packed food can be processed
by the QZ.
The QZ at the biogas plant in Schlitters.