PROJECT HIGHLIGHTS
- Commissioned February, 2008
- Commercial WW, Greeneld/li>
- 10/1/0.5 (TN/TP/Turbidity)
- Casino, Resort => Groundwater Recharge
- MMF Capacity: 0.18 MGD
- $25.38/gal
- 2 FTE (Full-Time Employees)
Lead Operator, Kenny Grasser, won the 2009 Evergreen Rural Water of Washington Wastewater System Operator of the Year Award.
DESCRIPTION
Before the Yakama Indian Nation built their own WWTP, their wastewater was sent to the City of Toppenish’s RBC plant. With the expansion of the Legends Casino Resort, the Tribe (true stewards of the environment) built an MBR System that produces reuse quality water even though it was not required. The entire infrastructure is built for 360,000 gpd, but only membrane capacity for half that. The effluent is sent to an irrigation canal. The biosolids produced from the MBR System are sent to a PAD-K (Pre-thickened aerobic digestion with membrane thickening) before going to a belt filter press, followed by a dryer, and then used to fertilize casino lawns. To reduce odors from the solids handling facility, the Tribe uses a simple biofilter system.
LOCATION
Toppenish, AK
IMAGES
PROJECT OVERVIEW
| System Type(s) | Ovivo ® MBR, PAD-K® |
|---|---|
| Previous Facility Type | None |
| Owner | Yakama Indian Nation |
| Engineer | CH2M Hill; Telegraph Engineering |
| Contractor | Apollo Inc. |
| Operations | Yakama Indian Nation |
| Delivery Method | Pre-Selection, DB |
| Time To Retrofit | 24 months |
| Total Installed Project Cost | $4,569,076 |
PLANT DESIGN INFORMATION
| Fine Screen Type | Bar Screen |
|---|---|
| Aperture or Slot Size | 2 mm |
| Supplemental Aeration Technology | Fine Bubble, Strips |
| MBR Blower Type | Positive Displacement |
| Solids Management Data | Aerobic Digestion, Membrane |
| SCADA System | Thickening, Belt Press, Dryer, Class A |
| Disinfection Method | Wonderware |
| # Process Stages | UV |
MBR (MEMBRANE ZONE) DESIGN
| Filtration Mode | Pumped |
|---|---|
| # of Reactors : | 2 |
| Submerged Membrane Unit (SMU) | ES200 |
| # SMU | 8 |
| Design Flux (MMF) | 13.1 gfd |
| Minimum Temperature | 12°C |
| Peak Factor | 2.0 |
| # of Maintenance Cleans | 4 |
