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Industrial Waste Water
Westfalia Separator Environmental Systems supplies the following
main products
For the following applications
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De-inking of Recycled Paper Pulp
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Paint Recovery from Waste Water
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Nuclear Power Plants Effluents
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Manure Dewatering
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Brewery Effluents
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Galvanic Sludge Dewatering
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Tannery Waste Water
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Mining Waste Water
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Coffee Plant Effluents
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Hydroxide Sludge
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Potato Peeling Effluents
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Dairy Effluent
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Steel Works Effluents
For waste water to be treated, it is necessary to separate or
collect the waste water via a separate channelling system. Gravity-based
separators are generally required in this respect. The waste lye
which occurs spo-radically in the cleaning processes has to be
neutralised or collected in tanks. The addition of flocculent
and coagulants facilitates the formation of coarse flakes which
lend themselves readily to separation.
Waste water from nuclear power plant.
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Forsmark Nuclear Power Plant, Sweden
Decanter Type CA 365
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Nuclear Power Plant Mühleberg, Switzerland
2 Decanters Type CA 220
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Radioactive substances are necessary for nuclear fission. Increasing
problems being encountered in the processing and treatment of
radioactive solid and liquid wastes. It is a problem to remove
the inactive, chemically pure waste and, at the same time, recover
the active impurities in the water in as highly concentrated as
possible. These can be economically stored.
 Another
problem in nuclear power stations is the treatment of the waste
water from laundries and wash rooms. Working clothes, i.e. overalls,
over-shoes, gloves, etc. must be washed in large automatic washing
machines. The wash water can contain radioactive substances. Consequently,
all nuclear power stations have laundries which wash working clothes
even after they have been worn just for a short period of time.
Thus, the consumption of water is very high, regardless of electrical
power. The automatic washing ma-chines are in operation day and
night, particularly during maintenance periods, when many servic-ing
personnel are working in critical zones.
The waste water, which contains radioactive substances,
is collected in tanks. As the contaminated solids are unequally
dispersed in the tank, it is extremely difficult to measure the
radioactivesubstances in the wash water. Nor it is possible to
take average samples.
Previously filters were used to eliminate the solids. For years
decanters and separators are being used to eliminate the solids.
For years decanters and separators are being used for this purpose.
They have greatly reduced the solids load, compared to pre-coat
filters.
The dewatered solids leave the decanter as a concentrate with
a moisture content of 10 to 35%. The concentrate is collected
in enclosed tanks. The non-separated solids contained in the clarified
liquid are homogenized by a centripetal pump in the discharge
of the decanter. The clari-fied water flows into a control tank
and is only fed to a centrifugal clarifier for polishing. The
solids separated out in the clarifier are collected in a tank
to be periodically recycled back into the decanter. The polished
wash water flows into a control tank and is only fed into the
drainage canal after intensive checks for radioactivity in accordance
with legal requirements. The radioactivity of the clarified water
is well below that stipulated by law.
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