This Project consists of the design and construction of three components in the establishment of a new Niagara-on-the-Lake Wastewater Treatment Plant, including the upgrade of the three (3) influent pumping stations, the design of the wastewater treatment plant and the extension of the existing outfall for the new plant.
The three existing sewage pumping stations were upgraded for larger capacity flows and to accommodate the new forcemains leading to the new wastewater treatment plant.
Accompanying the upgraded capacity were upgraded electrical supply and controls, upgraded BVAC and new and upgraded instrumentation and control. The linear infrastructure work required for connection to the new WWTP was also designed in this scope of work.
The new activated sludge wastewater treatment plant was required to replace the existing lagoon treatment plant and provide an increased treatment capacity with an average daily flow of 8,000 m3/d and instantaneous peak flow of 34,733 m3/d. The complete plant design included new headworks facility for screening, grit removal, alkaline dosing and storage; secondary treatment using extended aeration treatment with anoxic selection and clarification; disinfection via chlorination; de-chlorination; anaerobic digestion, sludge thickening and handling facilities. The design of the facility took into consideration the requirement to facilitate the capacity for receiving and treating hauled winery waste, which is a characteristic industry by-product for the Region. Special consideration was also given to the environmental impacts and the ecological sensitive area as well as the archaeological and cultural heritage preservation requirements.
The extension of the existing effluent outfall into Lake Ontario was required to accommodate additional diffuser ports for the discharge of the treatment plant effluent. The additional ports facilitate more efficient mixing into the receiving water body and assure meeting all environmental regulatory requirements.