PROJECT HIGHLIGHTS
Piedmont Regional WWTP is the largest membrane bioreactor treatment facility in South Carolina.
DESCRIPTION
With tighter effluent limits imposed by the South Carolina Department of Health and Environmental Control for the Saluda River, the County had to search at alternative options for the treated wastewater which would require new infrastructure. Several technologies were evaluated, and an Ovivo membrane bioreactor (MBR) system was selected. The new Piedmont facility consolidated the existing Grove Creek and Piedmont treatment plants, and also manages flows from surrounding areas including Pelzer, West Pelzer and Williamston. Effluent is discharged into the Saluda River through a river diffuser. The Piedmont Regional WWTP includes grit removal, wet weather equalization, fine screening, biological nutrient removal (BNR), flat‐plate submerged membrane units; low‐pressure, ultraviolet (UV) disinfection, and a reuse system for on‐site irrigation and plant uses. Sludge is thickened using flat‐plate submerged membrane units, and stored for off‐site anaerobic digestion.
LOCATION
Piedmont, SC
IMAGES
PROJECT OVERVIEW
| System Type(s) | Enviroquip ® MBR |
|---|---|
| Previous Facility Type | Lagoon |
| Owner | ReWa |
| Engineer | Jacobs Engineering Group, Inc. |
| Contractor | MWH Constructors |
| Operations | Renewable Water Resources (ReWa) |
| Delivery Method | Design Build |
| Time To Retrofit | 24 months |
| Total Installed Project Cost | $30,000,000 |
PLANT DESIGN INFORMATION
| Fine Screen Type | Drum Screen |
|---|---|
| Aperture or Slot Size | 2 mm |
| Supplemental Aeration Technology | Fine Bubble, Discs |
| MBR Blower Type | Positive Displacement |
| Solids Management Data | Membrane Thickening (MBT) |
| SCADA System | Wonderware |
| Disinfection Method | UV |
| # Process Stages | 4 |
MBR (MEMBRANE ZONE) DESIGN
| Filtration Mode | Pumped-Assisted-Gravity |
|---|---|
| # of Reactors : | 4 |
| Submerged Membrane Unit (SMU) | SP400, KUBOTA® |
| # SMU | 72 |
| Design Flux (MMF) | 12.9 gfd |
| Minimum Temperature | 10°C |
| Peak Factor | 2.0 |
| # of Maintenance Cleans | 2 |
