Lower North Tyger River Wastewater Treatment Facility
Spartanburg, SC
The Lower North Tyger River Wastewater Treatment Facility is a 2.5 MGD secondary treatment facility under construction for the Spartanburg Sanitary Sewer District. The site is designed for two future phases of expansion of 2.5 MGD each to a site development capacity of 7.5 MGD. To accommodate the anticipated increase, various components of the initial installation are designed for the future capacities.
The system utilizes the Carrousel â Oxidation Ditch for biological treatment. This is a highly efficient aeration system using very low speed surface aerators. The total treatment system contains the following major components:
- Primary Treatment
- Influent Pump Station with variable speed drives
- Mechanical Screening
- Grit Removal
- Secondary Treatment
- Biological Treatment utilizing a plug flow variation of the extended air process
- Clarification consisting of two circular clarifiers
- Activated Sludge Return using variable speed pumps
- Disinfection with ultraviolet irradiation
- Sludge Handling and Disposal
- Aerobic Digestion using diffused air for mixing and aeration
Although not required at this time, the treatment system and component arrangement was selected to provide for future requirements for nutrient removal and the addition of tertiary filters. The aeration system has an anoxic basin for denitrification.
A diesel-powered generator is provided capable of maintaining all major components in operation during an emergency.
