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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.
  • HOME
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    • Ovivo® MBR
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Home Case Study

Alderwood

Alderwood

PROJECT HIGHLIGHTS

CommissionedFebruary,2011 DomesticWW,NewConstruction Permit(s);Discharge NA/NA/NA(TN/TP/Turbidity) POTW Ocean MMFCapacity:4.1MGD $17.66/gal 6FTE(Full‐TimeEmployees
The support and follow-through we received from Ovivo far surpasses any that we have received to date from others while starting up our liquid stream.

DESCRIPTION

The original Picnic Point Wastewater Treatment Facility (WWTF) was constructed in 1973 to provide wastewater (sewage) treatment for the Alderwood Water and Wastewater District (District). The facility provides treatment and disinfection of sewage before discharging it into the Sound. Based on the results of an extensive evaluation, including a net present worth (NPW) analysis, an Enviroquip® MBR System was selected to renovate the old plant. Some of the evaluation criteria used to compare technologies and suppliers included noise, odor, economics, maintenance, operations, solids handling, visual appearance, permitting, truck traffic, and construction impact.

 

LOCATION

Alderwood, WA

IMAGES

GENERATE PDF VERSION

PROJECT OVERVIEW

System Type(s) Ovivo® MBR
Previous Facility Type CAS
Owner Alderwood Water and Wastewater District
Engineer URS Corp, Brown & Caldwell, CH2M Hill, Tetra Tech
Contractor Apollo Inc.
Operations District
Delivery Method DBB, Pre-Selection
Time To Retrofit 36 months
Total Installed Project Cost $72,422,229

PLANT DESIGN INFORMATION

Fine Screen Type Band Screen
Aperture or Slot Size 3
Supplemental Aeration Technology Fine Bubble, Strips
MBR Blower Type Turbo
Solids Management Data Centrifuge, Class A
SCADA System iFix
Disinfection Method UV
# Process Stages 5

MBR (MEMBRANE ZONE) DESIGN

Filtration Mode Pumped
# of Reactors : 4
Submerged Membrane Unit (SMU) RW400
# SMU 56
Design Flux (MMF) 11.7 gfd
Minimum Temperature 13.5°C
Peak Factor 2.38
# of Maintenance Cleans 3-12
Alpine