PROJECT HIGHLIGHTS
- Commissioned October, 2013
- Commercial WW, Retrofit
- Permit(s); Discharge
- 5/NA/2 (TN/TP/Turbidity)
- Travel Center => Spray field
- MMF Capacity: 0.025 MGD
- .5 FTE (Full-Time Employee)
- Quick Delivery, Consent Upgrade

Facing a MADEP consent order with a RBC system, a retrofit upgrade of the system using microBLOX™ technology brought the facility into compliance
DESCRIPTION
Using the general principals of a conventional MBR system combined with SND in the activated sludge process, nitrogen removal and filtering is accomplished in a single tank without the need for recycling (i.e., single stage system). To attain the predetermined dissolved oxygen set points, the dissolved oxygen is increased by utilizing the supplemental oxygen feed system to inject highly concentrated oxygen, thereby promoting nitrification (formation of nitrates), then enabling denitrification by reducing the oxygen feed to allow the bacteria to consume dissolved oxygen associated with the formed nitrates, which then results in formation of nitrogen gas. By incorporating SND in activated sludge process, the oxygen requirements for the system are reduced resulting in reduced energy and operational costs.
The effluent is further polished with a GAC media to assure TOC removal down to < 1 mg/L.
LOCATION
Sturbridge, MA
IMAGES

PROJECT OVERVIEW
System Type(s) | Ovivo® microBLOX™ MBR System |
---|---|
Previous Facility Type | RBC |
Owner | Pilot Travel Center |
Engineer | On Site Engineering |
Contractor | R.H.White |
Operations | Whitewater |
Delivery Method | Pre-selection, Pre-purchase |
Time To Retrofit | 6 Months |
Total Installed Project Cost | $Unknown |
PLANT DESIGN INFORMATION
Fine Screen Type | Bar Screen |
---|---|
Aperture or Slot Size | 2 mm |
Supplemental Aeration Technology | Concentrated Oxygen |
MBR Blower Type | Regenerative |
Solids Management Data | Membrane Thickening, Hauling |
SCADA System | Red Lion |
Disinfection Method | None |
# Process Stages | 1 |
MBR (MEMBRANE ZONE) DESIGN
Filtration Mode | Pumped |
---|---|
# of Reactors : | 2 |
Submerged Membrane Unit (SMU) | ES150 |
# SMU | 2 |
Design Flux (MMF) | 9.7 gfd |
Minimum Temperature | 10°C |
Peak Factor | 1 |
# of Maintenance Cleans | 6 |