PROJECT HIGHLIGHTS
Commissioned August, 2011
Domestic WW, Greenfield
Permit(s); Discharge
10/1/2 (TN/TP/Turbidity)
Municipal ⇒ River (Clearwater River)
MMF Capacity: 0.38 MGD
$11.8/gal
2 FTE (Full‐Time Employees)
Water quality and quantity have important cultural and economic significance for the Nez Perce Tribe.
DESCRIPTION
The Nez Perce Tribe and the City of Lapwai (in conjunction with Progressive Engineering) evaluated the existing collection and treatment facilities and decided that the most cost effective and environmentally sound plan was to construct a new regional treatment facility utilizing membrane biological reactor (MBR) technology. The Tribe's decision was made easy by the fact that Ovivo had ten certified representatives living in the same region (three of which are licensed operators) and that the integrator lives just a few hours away from the plant. The Lapwai WWTP was designed to be simple and operator friendly.
LOCATION
Lapwai, ID
IMAGES
PROJECT OVERVIEW
| System Type(s) | Enviroquip ® MBR |
|---|---|
| Previous Facility Type | Lagoon |
| Owner | Nez Perce Tribe |
| Engineer | Progressive Engineering |
| Contractor | Clearwater Construction & Management, LL |
| Operations | Nez Perce Tribe |
| Delivery Method | Pre-Selection |
| Time To Retrofit | 15 months |
| Total Installed Project Cost | $4,485,147 |
PLANT DESIGN INFORMATION
| Fine Screen Type | Bar Screen |
|---|---|
| Aperture or Slot Size | 2 mm |
| Supplemental Aeration Technology | Fine Bubble, Tubes & Disks |
| MBR Blower Type | Positive Displacement |
| Solids Management Data | Aerobic Digestion |
| SCADA System | Wonderware |
| Disinfection Method | UV |
| # Process Stages | 3 |
MBR (MEMBRANE ZONE) DESIGN
| Filtration Mode | Pumped |
|---|---|
| # of Reactors : | 2 |
| Submerged Membrane Unit (SMU) | EK400, KUBOTA® |
| # SMU | 10 |
| Design Flux (MMF) | 11.1 gfd |
| Minimum Temperature | 10°C |
| Peak Factor | 1.5 |
| # of Maintenance Cleans | 4 |
