Water Pollution Control



 Glossary / Definitions

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Environmental Services

Historical Info

Plant History


Stage 6 - Final Clarification

The effluent from the aeration tanks called mixed liquor enters the final clarifiers for a detention period of about four hours. The activated sludge settles out, is removed by underwater collection mechanisms, and is pumped back to the aeration tanks to maintain the bacteriological balance. A portion of the sludge that is no longer required for the biological balance in the aeration process is wasted to the primary settling tank and removed with the raw sludge to the anaerobic digester. The final clarifier effluent flows to the receiving waters of Yorkton Creek.