Kenora Area Water Pollution Control Centre

In 1975, the Ontario Ministry of the Environment engaged the firm of Proctor & Redfern Limited to provide engineering services for the design and construction of an extension to the Kenora Water Pollution Control Centre. The expanded plant was to become the Kenora Area Water Pollution Control Centre to serve the municipalities of Kenora, Keewatin and Jaffray-Melick. 

The project was funded under a Regional Priority Budget by the provincial Ministry of Northern Affairs with assistance from the federal Canada Mortgage and Housing Corporation on the basis of 100 percent grant.

The project was constructed in two separate contracts awarded to Harrison Rock & Tunnel Company Limited of Toronto, in 1977. 

The plant was put into operation in November, 1979 at a total cost, including equipment, of $3.5 million.

Plant Description

Location:   North end of River Road, Kenora, Ontario

Capacity:
Average 18,100 m3/d (4.0 MIGD)
Peak 45,500 m3/d (10.0 MIGD)

Plant Components:

1. Influent works
   Screening by Shallomatic Mechanical Screen, 1060 mm (42in.) width.
   Grit Removal by Deteritor, 6.7 m (22 ft.) diameter.
   Flow measuring by Parshall Flume, 450 mm (18 in.) width.
2. Aeration Tanks (Contact Stabilization Process)
   Contact Zone, 585 m3 (20, 740 ft2) volume.
   Reaeration Zone 1980 m3 (70,010 ft2) volume.
   Aerated by swing diffusers using 200 m3/min. (7360 SCFM) of air at 51.7 kPa (7.5 psi) pressure. 
3. Lift Station
   The aeration tank effluent is lifted to secondary clarification by pumps of the Archimedes principle screw type, capacity 63,600 m3/d (9725 lgpm), size 1675 mm (66 in.) diameter.
4. Secondary Clarification
   Two secondary clarifiers, each 24.4 m (80 ft.) diameter.
5. Chlorine Contact Chamber
   Disinfection of effluent prior to discharge by chlorination in Contact Chamber, 380 m3 (13,375 ft2) volume.
6. Aerobic Digestion
   Excess sludge is aerobically treated in an aerobic digestor, 1295 m3 (45,680 ft2) volume, aerated by 65 m3/min. (2280 SCFM) of air.
7. Sludge Dewatering Facilities
   Digested sludge is dewatered by Filter-Belt Presses, 1000 mm (40 in.) size, capable of dewatering 15.5 m3/hour (3400 lgpH) of aerobically digester sludge.
   Dewatered sludge is trucked off site for disposal in landfill.