Technology/IT | IDM
9 2017 | international-dairy.com · 17
• Energy costs are low as well, achieved
by applying high-efficient drinking water
pumps and system configurations.
• High level of automation and operator-friendly
process control unit minimize the requirements
for operator attendance, keeping the
costs for man-power low. At the same time
the quality of the treated water is documented
gapless by efficient monitoring.
4 Water Quality
The quality of the treated water in the Belgian
dairy was analyzed and assessed by IWW
Mühlheim with regard to use as process water
for CIP units in German dairies.
In Germany, such waters are generally subject
to the drinking water regulation (Trinkwasser
Verordnung). If a dairy intends to use
other waters than "drinking water" it requires
an exemption from the competent health authority.
Such an exemption may be granted
based on §18 TrinkwV, if they are convinced
that the quality of the water used does not
negatively affect the healthiness of the final
product. The IWW summarized their assessment
as follows:
• The colony count (directly after RO, before
disinfection) was slightly above the
limit defined in the drinking water regulation.
The RO permeate however is finally
disinfected by addition of 0.3 ppm chlorine
dioxide. Therefore there is no doubt that
in the final application there is no measurable
colony count anymore.
• The RO permeate is particle-free and low in
TOC (0.21 mg/l). It is therefore very easy to
disinfect.
• The pH and the solubility for calcite were below
the limits. Both values however were typical for
demineralized water and have no negative effect
on the applications intended.
• All other parameters (107 parameters analyzed)
were within the limits of the drinking
water regulation
• The permissibility of a deviation according
to §18 German drinking water regulation is
therefore confirmed without any restrictions"
5 Literature
1 Anonymus: Bekanntmachung der Neufassung
der Trinkwasserverordnung vom 02.
August 2013. Bundesgesetzblatt, Teil I, 2013,
ausgegeben zu Bonn am 07.08.2013 (46):
S. 2977-3004
2 IWW Prüfbericht „Untersuchung und Bewertung
von aufbereitetem Brüdenkondensat für
Lebensmittelzwecke in deutschen Molkereien
gemäß Trinkwasserverordnung, Juli 2015
The Daireuse process is a combination
of standardized units which are used
also in other drinking water applications
(photo: Veolia)
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