SPA 2 Membrane Water Reclamation Facility Design and CMAR

City of Surprise, 
Arizona

SPA 2 Membrane Water Reclamation Facility Design and CMAR

Project Highlights: 
  • Influent Pumping
  • Preliminary / Primary Treatment and Secondary Treatment
  • Microfiltration (MBR) and UV Disinfection
  • Solids Handling and Effluent Disposal
  • Architectural and Landscaping
  • Permitting
Suprise SPA-2 rendering
Carollo developed a conceptual design for a 2.0-mgd reclamation facility that utilized common wall construction and a membrane bioreactor.

The City of Surprise retained the PCL / Carollo Team to provide design and CMAR services for a 2.0 mgd Membrane WRF located in the City's Special Planning Area 2 (SPA 2). Carollo was the Designer of Record and PCL supplied CMAR contractor services for the construction of a new Water Reclamation Facility. The facility incorporates biological nutrient removal (BNR), membrane filtration, and UV disinfection. The City challenged the PCL/Carollo Team to design a water reclamation facility for SPA 2 that could produce Class A+ reclaimed water—the highest quality reclaimed water in Arizona—within a well-defined budget for design and construction. To meet this challenge, Carollo developed a conceptual design for a facility that utilized common wall construction and a membrane bioreactor. The use of common wall construction allowed efficient use of the site area, minimized excavation and backfill to allow future expansion. The use of a membrane bioreactor (MBR) eliminated the need for conventional sedimentation, filtration, and disinfection facilities, thus minimizing excavation, concrete, and electrical construction costs. This overall approach allowed for facilities to be constructed in close proximity to each other, thereby reducing yard piping, electrical conduit, and site work. Reclaimed water disposal will be through on-site vadose zone recharge wells.

The facility includes the construction of the following unit processes:

  • Influent pump station
  • Aeration basin with aerobic and anoxic zones
  • Feed forward system to membrane filtration system
  • Membrant bioreactor (MBR) filtration system
  • Ultraviolet (UV) disinfection
  • Foul air treatment systems
  • Reclaimed water metering and recharge wells
  • Reclaimed water recharge basins
  • New motor control center
  • Programmable logic controller (PLC)
  • Automated SCADA system
  • Remote communication to City's main operations center

PCL performed work on all structural concrete, site grading, process equipment installation, mechanical and yard piping installation. PCL was also responsible for the installation of all buried utilities, structural steel and miscellaneous metals, startup, training and commissioning.