Institute for Sanitary Engineering, Water Quality and Solid Waste ...

Industrial Water and Wastewater Technology IWT
Figure: JZR pilot plant at the production of the WALA
Heilmittel GmbH
The main operational issues faced during the trial program
were foaming, low membrane flux, and mechanical
disruptions. The COD removal efficiency of the
JZR-membrane unit during the ten weeks of efficiency
testing was 88 % (± 6 %). The reduction efficiency of
the oil and grease parameter was greater than 99 %;
the permeate concentration was about 3 mg/l, which
was well below the le-gal discharge limit of 300 mg/l.
Zinc and copper concentrations tested during the heavy
metal phase were extremely low or not detectable
in the permeate. Most of the heavy metals in the flow
stream were removed via the flotate from the flotation
unit and the excess sludge from the JZR. The pilot plant
was found to run effectively at a sludge loading rate
of up to 2.0 g COD/(g TSS • d). The average sludge
growth rate was 0.14 Δg TSS/(g COD eliminated) for
the testing period.
Client:
WALA Heilmittel GmbH, Bad Boll/Eckwälden
Project Partner:
WEHRLE Umwelt GmbH
Contact Persons:
Prof. Dr.-Ing. Uwe Menzel
Dipl.-Ing. Timo Pittmann
The official inspection office, responsible for carrying
out practical tests at different plants to ensure
the reduction of hydrocarbon in wastewater
containing mineral oil.
As a result of Prof. Menzel being appointed part of the
expert-committees
• “Abscheider und Mineralölhaltiges Abwasser -A-
(428)”
• “Mineralölhaltiges Abwasser -B 3-(428c)”
• “Miniralölhaltiges –B 4-(428d)”
by the “Deutsches Institut für Bautechnik (DIBt)” in
Berlin, the Institute for Sanitary Engineering, Water
Quality and Solid Waste Management at the University
of Stuttgart (IWT department) was then appointed as
the official inspection office. The department is responsible
for carrying out practical tests at different plants
to ensure the reduction of hydrocarbon in wastewater
containing mineral oil.
Client:
Deutsches Institut für Bautechnik (DIBt), Berlin
Contact Persons:
Prof. Dr.-Ing. Uwe Menzel
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