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Water and Wastewater Plant Directory
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Saskatoon, Saskatchewan, Canada
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Saskatoon Water Treatment Plant
c/o City of Saskatoon
222 3rd Ave. North
Saskatoon, Saskatchewan, S7K 0J5
Canada
Contact Information:
Contact:
Email:
utility.services@saskatoon.ca
Telephone:
Fax:
Plant Operation: Municipal
Processing: Water
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Web site:
http://www.city.saskatoon.sk.ca/org/water_treatment/water_treatment/water_treament_home.asp
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Plant/Process Description:
Water is taken directly from the South
Saskatchewan River through intakes at the Queen
Elizabeth Power Station. It is screened and then
pumped to the Water Treatment Plant with City
owned pumps located within the Queen Elizabeth
Power Station pump room. In the winter months
cooling water from the Power Plant is used
whenever possible to raise the temperature of the
raw water. The warmer water results in improved
treatment efficiencies. The intakes and low lift
pumps at the Water Treatment Plant are only used
to augment the base supply from the Queen
Elizabeth Power Station.
Ferric Sulfate and potassium permanganate are
added to the raw water prior to the clarification
process. Potassium permanganate is used to
eliminate taste and odor problems caused mainly
from organic constituents. The ferric sulfate is
used to agglomerate the solid particles into
large groups of particles known as floc, thus
increasing their size to a point where they will
settle more rapidly.
The water then enters the clarifiers, where it is
mixed and lime is added. Lime reacts with the
hardness in the water to form insoluble
carbonates and hydroxides. These settle out and,
in the process, aid in entrapping
turbidity.
The clarifier floc concentration is carefully
controlled and maintained as a dense circulating
slurry. The clear water is drawn off the outer
top of the clarifier through radial launders,
while the floc settles and concentrates in the
center mixing zone of the clarifier. Excess
sludge is flushed back to the river. Under these
carefully controlled conditions, pristine water
is produced by the clarifiers.
Chlorine & sodium silico fluoride are added just
prior to the water's entrance into a large
detention / sedimentation tank. Chlorine is added
to kill harmful bacteria while fluoride is added
to assist in the prevention of tooth
decay.
The detention / sedimentation basin provides the
necessary contact time for the disinfection
process and further clarification through
settling. The water is then filtered through
rapid sand or dual media filters (sand and
crushed coal [anthracite]). The sand beds are
gradually being retrofitted to dual media to
increase the filtration capacity. Filtration
rates are carefully controlled in attempts to
maintain water turbidity of less than 0.1
NTU.
Following filtration, ammonia hydroxide is added.
The ammonia combines with the free chlorine
(previously added) to form chloramines.
Chloramines have a poorer disinfection capability
than chlorine but remain active for a much longer
period of time. This extended activity permits
disinfection to continue throughout the
distribution system.
The water is retained in the clear well storage
beneath the filter for 8-30 minutes and is then
pumped to the distribution system at a pressure
ranging from 620 to 690 kPa. Water pressure is
automatically maintained through the use of
variable speed pumping equipment.
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Owner:
City of Saskatoon
Web site:
http://www.city.saskatoon.sk.ca/
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Operating Company:
City of Saskatoon
Web site:
http://www.city.saskatoon.sk.ca/
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Directions:
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Disclaimer:
Water and Wastewater.com provides the information on
this page for reference purposes only. We do not certify
the accuracy of the information provided by third-party
individuals for this listing.
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