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MBRCentral.com is your source of information for OVIVO® MBR products & services. Constantly evolving, MBRCentral.com will provide you with all the tools you need regarding OVIVO® MBR.
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Home Case Study

Chehalis Petoie

Chehalis Petoie

PROJECT HIGHLIGHTS

• Commissioned February, 2008 • Domestic WW, Greenfield • Permit(s); Not Required • 10/1/2   (TN/TP/Turbidity) • Housing Development ⇒ Infiltration Bed MMF Capacity: 0.02 MGD $27.49/gal “One of two Enviroquip MBR Systems the Tribe owns.” 0.25 FTE (Full‐Time Employees)
One of two Enviroquip MBR Systems the Tribe owns.

DESCRIPTION

The Confederated Tribes of the Chehalis Reservation located in Oakville, WA developed a Master Plan for their reservation that included seven (7) decentralized MBR Systems for wastewater treatment ranging in size from 6,000 gpd to 112,000 gpd. The second, of which, treats wastewater from a housing development.  The pre‐ cast concrete package plant was located inside a metal frame building to help the plant blend into the surrounding neighborhood. The existing onsite septic system was left in place as a standby to be used when the single train MBR System was down for cleaning or maintenance. Discharge from the facility is sent to an infiltration basin. For more information on the first MBR plant on this reservation, please see the Chehalis Public Safety Building WWTP case study.

LOCATION

Oakville, WA

IMAGES

GENERATE PDF VERSION

PROJECT OVERVIEW

System Type(s) Enviroquip ® MPAC®
Previous Facility Type Septic
Owner Confederated Tribes of the Chehalis Reservation
Engineer Brown & Caldwell, Ayres & Associates
Contractor Ayres & Associates
Operations Confederated Tribe of the Chehalis Reservation
Delivery Method Negotiation, Pre-Purchase
Time To Retrofit 19 months
Total Installed Project Cost $549,740

PLANT DESIGN INFORMATION

Fine Screen Type Bar Screen
Aperture or Slot Size 2 mm
Supplemental Aeration Technology Fine Bubble, Disks
MBR Blower Type Regenerative
Solids Management Data Hauling
SCADA System Wonderware
Disinfection Method Chlorine
# Process Stages 3

MBR (MEMBRANE ZONE) DESIGN

Filtration Mode Pumped
# of Reactors : 1
Submerged Membrane Unit (SMU) ES75, KUBOTA®
# SMU 2
Design Flux (MMF) 11.6 gfd
Minimum Temperature 10°C
Peak Factor 2.0
# of Maintenance Cleans 2
CFII
Chehalis Public Safety Buildin...