RM Clayton WRC – Two Scroll Bowl Kits, Switch Gears, Emergency Generators

complete / construction

Constructed in 1965, the R. M. Clayton Water Reclamation Center (WRC) located in northwest Atlanta along the Chattahoochee River provides wastewater treatment for a service area that encompasses north of I-20, a small portion of north Fulton County adjacent to Sandy Springs, and most of north DeKalb County. The facility is designed to treat an average daily maximum monthly flow of 122 million gallons per day (mgd) of wastewater for discharge to the Chattahoochee River under a National Pollutant Discharge Elimination System (NPDES) Permit. The treatment process removes biological and chemical impurities from the wastewater in three phases: primary treatment, secondary treatment, and tertiary treatment. The primary treatment process begins with the removal of floatable and settleable solids. Next, biological treatment during the secondary treatment phase reduces the concentration of organic and chemical pollutants. Finally, tertiary treatment removes the remaining suspended solids, disinfects the treated water using ultraviolet radiation and increases dissolved oxygen concentrations before discharging to the Chattahoochee River. The biological solids that are removed during the wastewater treatment process are reduced in the digestion process before being dewatered and incinerated or hauled to a landfill. The biological solids handling systems in need of additional capacity in order to handle excessive grit and debris loading. The centrifuges at R.M. Clayton WRC are of the scroll bowl type. These centrifuges use a high rotational speed to separate solids from liquids. A helical screw conveyor continuously discharges the separated solids from the bowl. The scroll conveys the solids from the stationary zone where the wastewater enters to the dewatering beach where the solids are discharged. The scope of this project includes: Installing two spare scroll bowl kits for the sludge thickener centrifuges, Replacing obsolete switch gears, Providing emergency generators for the Blower Building

High