Client project
Replacement of equipment at the Magog wastewater treatment plant
- Construction cost
- ± 20 M$
- Duration
- 17 months
- Schedule
- November 2022 to March 2024
- Disciplines
- 9 trades
- Client
- City of Magog (QC)
- Location
- 831 rue Hatley, Magog (QC)
- Project type
- Replacement of treatment equipment
At a glance
Project description
The project consists of supplying and installing the following equipment:
Scope of work
Work performed
- Replace the mixed liquor outlet overflow crest wall valve from the oxygenation ditches
- Repair and resurface exposed concrete surfaces
- Replace wall seals
- Replace the circular scraper, the spillway, the collection of floats, the secondary decanters walkway
- Replace the Archimedes screw pump for activated sludge recirculation
- Replace the liquid alum storage and dosing system
- Replace the submersible mechanical agitator in the sludge storage basin
- Add a submersible mechanical agitator to the sludge storage basin
- Replace the sludge pumping system (duplex) including upstream pipes, mesh pipes and downstream pipes
- Supply, install and commission two centrifuge type sludge dewatering systems complete with their local control panel
- Supply and install a mezzanine for the proposed centrifuges as well as a monorail with trolley and manual operation hoist
- Supply, install and commission screw conveyors for transporting dewatered sludge
- Supply, install and commission a dewatered sludge spreader
- Supply, install and commission a polymer preparation and dosing system for the application of sludge dewatering on centrifuges
- Provide new ventilation – heating (HVAC) systems to mechanical rooms
Planning municipal infrastructure work? Get our team’s input.
Request a quoteOn site
Project challenges
- Maintaining the operation of the wastewater treatment plant at all times
- Work on the oxygenation ditches and decanters could only be carried out on one structure at a time. A ditch could only be shut down when the flow rate was below 17,000 m3 and therefore could not take place during the snowmelt period
- Installation and operation of a temporary dewatering unit
- Design, layout and construction of the foundation and structure for installation of centrifuges
- Neighboring construction site
- Start-up of the complete sludge dewatering train
Services provided
- Project management
- Construction management
- Coordination of subcontractors
- On-site testing coordination
- Quality control
- Development
Disciplines
Group division
Delivered with CWA Process Engineering
The replacement of the treatment equipment, the sludge dewatering train and its start-up were delivered with CWA Process Engineering, a Groupe ALLEN division. Working inside a plant that stays in operation, on structures that could only be taken out of service one season at a time, is precisely where that expertise applies.
- Wastewater treatment
- Process mechanics
- Sludge dewatering
- Plant in operation
- Instrumentation and controls
Planning a similar project?
Our team supports municipalities and project owners from design through commissioning.
