What is primary clarifier?
Primary clarification includes 2 primary clarifiers which reduce grease, solids, and some organics from the influent wastewater by settling. The settled solids (sludge) are scraped to a hopper in the center of the clarifier by a rotating scraper mechanism and pumped to the sludge holding tanks where they e later treated by the Solids Handling Facility.
What is the purpose of preliminary treatment?
The purpose of the preliminary treatment process is to remove large objects and grit thereby preventing possible damage to the downstream treatment units.
How does a final clarifier work?
Final clarification consists of 3 final clarifiers, each with a sludge removal mechanism. Flow leaves the BNR tanks and enters the final clarifiers through a center feed well and flows out radially towards the periphery. Solids within the process settle and are then collected from the clarifier by rotating arms that are just above the clarifier floor. Three return sludge pumps, pump the solids back into the BNR process or it is wasted to the Solids Handling Facility by 2 waste sludge pumps. The effluent flow from the final clarifiers is routed through 5 filters to remove the small number of solids that remain.
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