Westside Regional Wastewater Treatment Plant
The Regional District of
Central Okanagan operates a
Biological Nutrient Removal
(BNR) Wastewater Treatment
Plant (WWTP). The Westside
Regional Wastewater
Treatment plant is
located on Gellatly Road and
receives wastewater from the
District of West Kelowna,
the District of Peachland
and Westbank First Nation
Reserves #9 and #10. The
original plant was
commissioned and put into
service in 1989. Stage
1 Upgrades were commissioned
in 1994 and Stage 2 Upgrades
were commissioned in the
spring of 2007. Stage
3 Upgrades are underway as
of late 2010. Greyback
Construction is handling
this project (Link to
October 2010 Board Report).
The original treatment plant
was designed for a service
population of 7,000 people
and a nominal hydraulic
capacity of 2,800 cubic
meters of wastewater per
day. The Stage 1 and 2
Upgrades were each designed
to service a population of
14,000 people and a nominal
hydraulic capacity of 5,600
cubic meters per day,
bringing the combined
service to 35,000 people and
a nominal hydraulic capacity
to 14,000 cubic meters per
day. The original treatment
plant has been taken out of
service. Stage
3 construction upgrades are
underway and when completed
in late 2011 will
allow the plant to provide
wastewater treatment for
approximately 42,000 people
with a nominal hydraulic
capacity of 16,800 cubic
meters per day.
Influent wastewater enters
the plant through a Parshall
Flume (to provide control
and monitoring of flow) and
is then screened and
degritted prior to receiving
primary clarification. The
plant operates a secondary
treatment process called the
“Westbank Process” an
internationally recognized
process of treating
wastewater. The Westbank
Process is based on the
3-Stage Bardenpho process
with provisions for a Return
Activated Sludge
denitrification upstream of
the anaerobic zone. Each
bioreactor feeds a dedicated
secondary clarifier. The
effluent undergoes tertiary
treatment via filtration and
Ultra Violet disinfection.
The tertiary treated
effluent from the plant is
discharged into Okanagan
Lake through an outfall.
The primary solids stream at
the treatment plant undergoes
fermentation, while the
waste secondary solids
stream is treated with a DAF
thickener. Both streams are
pumped to a centrifuge for
dewatering with the
dewatered sludge trucked off
site for disposal.
Biosolids generated from the
Westside Regional Wastewater
Treatment facility are being
managed through contract by
SYLVIS on behalf of the
Regional District of Central
Okanagan. Link to
October 2010 Board Report
User Fees
User fees are required to pay for operation and maintenance costs and to set aside
funds for future equipment repairs and replacements.
For detailed sewer system fees view an electronic version of
Consolidated Sewer Systems Bylaw No. 1171 which is provided for convenience
only. For more information, email us at
engineering@cord.bc.ca or call
250-469-6241.
Other Information
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