Springtree Water Treatment Plant Renewal and Improvements

City of Sunrise, 
Florida

Springtree Water Treatment Plant Renewal and Improvements

Service Type: 
Project Highlights: 
  • The RO treatment facilities were designed and bid on a fast tracked schedule to allow the City options in meeting its alternative water supply requirements.
  • Modular RO treatment units were designed for commonality among two of the City’s water treatment plants.
  • Carollo made recommendations in the study phase, that if implemented, are projected to reduce operational costs while improving finished water quality.
  • 3D design was utilized to minimize design conflicts and simplify stakeholder understanding of the complex water treatment processes.
Carollo recommended operational improvements to the softening process
Carollo recommended operational improvements to the softening process that when implemented is expected to improve efficiency and reduce operational costs.

Carollo performed a study that included the evaluation of potential improvements for rehabilitation and renewal of a 24-mgd lime softening facility. The systems, processes, and facilities that were evaluated in the study and basis of design development phase of this project include: an organics removal system, disinfection rule compliance modifications, solids contact clarifier performance upgrades, sludge dewatering upgrades, chemical system upgrades (lime, sodium hypochlorite, fluoride), distribution system pumping upgrades, controls system upgrades, an entirely new administration and controls building, repurposing of an existing Floridian aquifer ASR well as a supply well for RO treatment for 1.5 mgd of permeate, demolition of existing filters, interior site lighting upgrades, drainage upgrades, repiping of ground storage reservoirs, and other general renewal, replacement and painting upgrades. During the study phase, Carollo also performed bench-scale testing of ion exchange and ballasted flocculation technologies for organics control alternatives. Fluidized bed ion exchange was recommended for full scale implementation. This system, if implemented, was projected to reduce organics in the finished water leading to subsequent chemical and sludge reduction in the existing lime softening process while improving finished water quality.

Carollo performed the design services for this project in multiple phases. The first was to replace four 15,000-gallon each sodium hypochlorite tanks on an accelerated schedule to replace the existing tanks. The RO Treatment Facilities design package included design of an RO system that is expandable in 1.5 mgd treatment units to a capacity of 3 mgd of permeate. The treatment processes included chemical storage and feed systems, replacement of existing Floridian aquifer well pump, sand strainers, cartridge filters, RO membrane treatment system with associated clean-in-place system, degasification, and two stage air quality control units. The RO treatment system was designed to blend RO permeate with existing lime softening treated water upstream of the existing ground storage clearwells to produce a composite finished water. The third bid package included the addition of a new plant controls building, new 12-mgd high service pumping station, and miscellaneous renewal and improvements to the existing softeners.