Outstanding biomass treatment with the QZ - MeWa Recycling ...

• Metal parts are no problem
The machine is not sensitive to the metal
parts that are also frequently found in
bio waste. The axle of a collection barrel
or mineral parts such as stones or concrete
slabs are no obstacle for the QZ. Indeed
the recycling machine was actually originally
designed for metal compounds.
In a last step, the substrate is homogenised
in just one operation and treated
making it ideal for the bacteria in the
fermenter. “Opening packaging with the
Querstromzerspaner replaces a biological
pre-treatment phase which would otherwise
have to be carried out using hydrolysis,“
explains plant construction engineer
Klemens Finsterwalder.
A separator finally separates extraneous
materials such as bones or wooden
pieces, metal or foil packaging. The biomass
is then sanitised and conducted to
the fermenter where liquid manure from
agriculture is added.
For plant operator, Josef Kröll, investment
in the Querstromzerspaner has already
paid off. In Schlitters, the expected
increase in biogas output was taken into
account early on at the design stage. A
block heating station converts the output
at the end to heat and 330 kW electrical
MeWa-News March 2009
The QZ 900’s treatment
of biomass is impressive.
energy. All that is left at the last is fermentation
residue.
“This not only smells more pleasant
than liquid manure, it is better fertiliser
too,“ explains Josef Kröll. This means the
ecological balance in Schlitters is harmonious
and the countryside – the most
valuable resource in this tourism region –
profits most. ■
Market & trends
Typical content of a bio waste collection barrel.
Input: packaged food.
Output: perfectly treated substrate
Plastics can be separated easily.
System control via computer:
Josef Kröll at his workstation.