A new residuals management process at a water treatment plant in Alberta is designed to improve the environment for fish and for recreational boaters on the Red Deer River.
The city of Red Deer operates a surface water treatment plant (40 mgd design, 12 mgd average) for 101,000 city residents and several neighboring communities. It draws water from the river and uses the Actiflo rapid-settling clarification system (Veolia Water Technologies).
For years the clarifier blowdown, consisting mainly of solids removed from the raw water along with some aluminum sulfate and sand from the clarification process, was discharged to the river through a stormwater
