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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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    • Ovivo® MBR
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Home Case Study

Larrabee State Park

Larrabee State Park

PROJECT HIGHLIGHTS

Commissioned November, 2009 Domestic WW, Greenfield Permit(s); Discharge 6/NA/0.2    (TN/TP/Turbidity) State Park ⇒ River MMF Capacity: 0.03 MGD $87.2/gal 0.25 FTE (Full‐Time Employees)
Pollutants entering the Puget Sound and Hood Canal from these two parks have been reduced by more than 95%.

DESCRIPTION

The Larrabee plant has been in operation since November 2009. Some concerns during design were high flows over holiday weekends and plant operation during the off‐season, when flows at the plant can vary by 90%. The flexibility integrated into the design has allowed the operator to come up with strategies to maintain effluent quality during periods of low flow, which was an initial challenge for plant operations. One of the strategies it uses is remotely turning equipment on or off to provide nutrients for the biology of the plant when it receives very little flow during the winter. The Ovivo MBR System was selected based on lowest capital cost, lowest operation and maintenance costs, and lowest cost of ownership.

LOCATION

Bellingham, WA

IMAGES

GENERATE PDF VERSION

PROJECT OVERVIEW

System Type(s) Enviroquip ® MPAC®
Previous Facility Type Lagoon
Owner Washington State Parks & Recreation
Engineer Hammond, Collier, Wade, Livingstone
Contractor BOSS Construction
Operations West Sound Utility District
Delivery Method Pre-Selection, Pre-Purchase
Time To Retrofit 9 months
Total Installed Project Cost $2,180,000

PLANT DESIGN INFORMATION

Fine Screen Type Bar Screen
Aperture or Slot Size 2 mm
Supplemental Aeration Technology Fine Bubble, Tubes
MBR Blower Type Regenerative
Solids Management Data Hauling
SCADA System Wonderware
Disinfection Method UV
# Process Stages 4

MBR (MEMBRANE ZONE) DESIGN

Filtration Mode Pumped
# of Reactors : 1
Submerged Membrane Unit (SMU) Es125, KUBOTA®
# SMU 2
Design Flux (MMF) 12.3 gfd
Minimum Temperature 10°C
Peak Factor 2.0
# of Maintenance Cleans 2
Lapwai
Los Lunas