The Chilliwack Wastewater Pretreatment Facility is sustainably treating
what many consider one of our most precious resources: water.
PCL built this wastewater pretreatment plant to accommodate the large amount of
effluent that the new Molson Coors brewery in Chilliwack, British Columbia, will produce.
“The brewery wastewater that
comes from the Molson Coors plant is a high-strength wastewater, which means there’s
a large amount of organic
matter in the water content,” says PCL project manager Anthony
Slivinski. “That results in
the water needing pretreatment before it goes to the main facility.”
Chilliwack Wastewater Pretreatment facility processes 19,000 gallons of water per
hour, which the brewery requires to produce more than 211,000 cans of beer in the same amount of time.
The brewery sends the effluent on a four-kilometer journey through underground
piping before the treatment process begins. The effluent is then analyzed and pretreated
and sent to the digester, where a sludge bed of microorganisms will eat any solids suspended in the wastewater.
This process results in the formation of bio-gas, which is collected and intended to power the Calorix in the future, the main water
heater for the facility. The Calorix is the first installation of its kind in Canada.
“Use of bio-gas reduces reliance on fossil fuels, so it’s a
sustainable process that will
bring future benefit,” says
Slivinski. “And sludge used in
the digestor can be removed to fertilize farmland.”
Water infrastructure built by PCL,
such as treatment plants and reclamation facilities, makes available more than 20 billion gallons of treated
water per day to communities and local
businesses across North America.