PROJECT HIGHLIGHTS
Commissioned July, 2008
Domestic WW, Greenfield
Permit(s); Discharge + Reuse
NA/NA/NA (TN/TP/Turbidity)
Municipal ⇒ Reuse, River
MMF Capacity: 0.25 MGD
$27.6/gal
2 FTE (Full‐Time Employees)
One of two Enviroquip MBR plants owned by Harvest Monrovia WSFPA
Plant averages 0.04 mg/l NH3‐N, 0.23 mg/l BOD, and 0.036 mg/l TSS.
DESCRIPTION
Operated and maintained by the Harvest‐Monrovia Water, Sewer and Fire Protection Authority, the MBR plant is located in Madison County, AL (a major part of Huntsville metropolitan area). High quality permeate from the MBR treatment is an ideal solution to tackle the challenges observed with the imposing of stringent TMDL (Total Maximum Daily Load) limits for BOD, TSS & NH3. Limited space availability of the plant site also contributed towards the selection of Ovivo MBR technology, which could be employed in real small footprints. The plant is designed to operate in gravity mode. System includes membrane thickening and digestion. For more information about the other MBR plant in Harvest Monrovia, see the Jeff Road WWTP case study.
LOCATION
Harvest, AL
IMAGES
PROJECT OVERVIEW
| System Type(s) | Enviroquip ® MBR, MBT |
|---|---|
| Previous Facility Type | None |
| Owner | Harvest-Monrovia Water, Sewer & Fire Protection Authority |
| Engineer | GW Jones |
| Contractor | BH Craig Construction |
| Operations | Harvest-Monrovia Water, Sewer & Fire Protection Authority |
| Delivery Method | Pre-Selection, DBB |
| Time To Retrofit | 18 months |
| Total Installed Project Cost | $6,900,000 |
PLANT DESIGN INFORMATION
| Fine Screen Type | Bar Screen |
|---|---|
| Aperture or Slot Size | 2 mm |
| Supplemental Aeration Technology | Fine Bubble, Tubes & Disks |
| MBR Blower Type | Positive Displacement |
| Solids Management Data | Membrane Thickening |
| SCADA System | Wonderware |
| Disinfection Method | UV |
| # Process Stages | 4 |
MBR (MEMBRANE ZONE) DESIGN
| Filtration Mode | Gravity |
|---|---|
| # of Reactors : | 2 |
| Submerged Membrane Unit (SMU) | EK400, KUBOTA® |
| # SMU | 6 |
| Design Flux (MMF) | 12.1 gfd |
| Minimum Temperature | 18°C |
| Peak Factor | 2.0 |
| # of Maintenance Cleans | 2 |
