PROJECT HIGHLIGHTS
- Commissioned May, 2010
- Domestic WW, SBR Retrofit
- Permit(s); Discharge
- 12/NA/NA (TN/TP/Turbidity)
- Municipal => River
- MMF Capacity: 0.86 MGD
- $13.26/gal
- 3 FTE (Full-Time Employees)
Five time award winning plant.
DESCRIPTION
The La Center WWTP was designed to be expanded to treat over 6 MGD on less than an acre. The new facility is being designed in phases to be efficient and capacity added as needed.
Phase 1 added the new MBR system, complete with a new headworks building, screening system, and blower room all sized for 20 year flows based on the City’s Comprehensive Plan. The flow capacity of Phase 1 is 0.86 MGD maximum monthly flow with a peak daily flow of 1.5 MGD.
Phase 2 will address additional solids handling needs and Phase 3 would double the capacity of the plant by duplicating the Phase 1 upgrades for the Membrane Bioreactors (MBR) and should have capacity to treat the 2028 population.
LOCATION
La Center, WA
IMAGES
PROJECT OVERVIEW
| System Type(s) | Ovivo MBR |
|---|---|
| Previous Facility Type | SBR |
| Owner | City of La Center |
| Engineer | Kennedy/Jenks |
| Contractor | McClure & Sons |
| Operations | City of La Center |
| Delivery Method | Pre-Selection, Pre-Purchase |
| Time To Retrofit | 16 months |
| Total Installed Project Cost | $11,400,000 |
PLANT DESIGN INFORMATION
| Fine Screen Type | Drum Screen |
|---|---|
| Aperture or Slot Size | 3 mm |
| Supplemental Aeration Technology | Fine Bubble, Strips |
| MBR Blower Type | Positive Displacement |
| Solids Management Data | Screw Press, Dryer, Land Application |
| SCADA System | Wonderware |
| Disinfection Method | UV |
| # Process Stages | 3 |
MBR (MEMBRANE ZONE) DESIGN
| Filtration Mode | PAG (Pump Assisted Gravity) |
|---|---|
| # of Reactors : | 2 |
| Submerged Membrane Unit (SMU) | RW400 |
| # SMU | 10 |
| Design Flux (MMF) | 13.8 gfd |
| Minimum Temperature | 13°C |
| Peak Factor | 2.3 |
| # of Maintenance Cleans | 4 |
