Donnacona Relies On Singer's Control Valve To Solve Tough Flow Control And Pressure Challenges In Their Upgraded Water Treatment Plant

By Alain Gravel, Dessau Engineering and Mark Gimson, Singer Valve

Donnacona is an industrial town just west of Quebec City.  The town’s Water Treatment Plant was built in 1969 and has since undergone three major retrofits: in 1995 (new high pressure pumps & electrical upgrade), in 2000 (filters bottoms change), and in 2005 (river water intake upgrade). The plant includes conventional treatments for coagulation, sedimentation (pulsator), filtration (sand filters) and disinfection (Cl2). The raw water pumping station is 1.5km away from the plant and includes two single speed pumps.

To ensure compliance with the latest regulations about the quality of drinking water , the City decided in 2008 to modernize the plant. The treatment process was reviewed and it was determined the pulsators and filters needed to be dismantled and replaced with fine screening, a new coagulation chamber and a new ultra filtration membrane filtration step, which was to be the Zeeweed 1000.