The Treatment Process
The purpose of the preliminary treatment process is to remove large objects and grit thereby preventing possible damage to the downstream treatment units. The process consists of 1 mechanical coarse bar screen and 2 mechanical fine bar screens that remove objects such as rags, sticks, and other large items from eh raw wastewater. After the screening process, the wastewater goes through the grit removal facilities where 2 stirred vortex grit collectors remove sand and gravel.
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.