Backwash Treatment Facility
Backwash water contains the solids removed from the filters, and contractors.
A polymar is added to the backwash water to help remove the suspended particles by making them sticky. This forms floc.
The floc particles are separated out in settling tanks and clarifiers.
The settled solids are trucked to the G.E. Booth treatment facility to be treated.
The clean water from the clarifiers is de-chlorinated (removal of chlorine from water) using sodium bisulphate before it is returned to the lake.
Large amounts of chlorine released into the lake can kill aquatic life and disrupt the ecosystem.
Backwash water from the membrane filters is either returned to the lake or pumped to a sanitary sewer, depending on the amount of solids.
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