Qatarunited States Three Tender

To keep pace with increasingly stringent regulations and growing demand Lee County Utilities in southwest Florida recently constructed a new larger drinking water facility that treats three separate and very different groundwater sources. The 14 mgd Green Meadows Water Treatment Plant near Ft. Myers includes a unique combination of reverse-osmosis ion exchange and degasification systems to treat the highly variable water supplies as efficiently and cost effectively as possible.Two packed tower degasifiers remove hydrogen sulfide and carbon dioxide from a blended flow comprising permeate from the reverse-osmosis treatment system and bypass water from the Sandstone aquifer. JacobsModern water utilities face various challenges including an ever-aging infrastructure shifting workforce demographics unreliable or changing water supply sources evolving regulations and rising customer expectations. However for Lee County Utilities LCU based in Ft. Myers Florida a customized water supply solution offered the only sustainable option to deal with three separate sources of groundwater. By contrast most drinking water providers typically rely on one water source and one treatment system. At the same time the LCU which currently serves more than 254000 customers in southwest Florida needed to expand its capacity to accommodate growth demands.To provide the high-quality potable drinking water that its customers expect the LCU recently opened the new 14 mgd Green Meadows Water Treatment Plant WTP near Ft. Myers. The first-of-its-kind facility in southwest Florida the Green Meadows WTP combines new and existing technology to treat water from three aquifers using the latest large-scale treatment technologies. The new facility replaces an aging lime softening plant that had operated for more than 35 years and reached the end of its useful life.The Green Meadows WTP includes a reverse-osmosis RO system to desalinate brackish well water from the Upper Floridan aquifer UFA as well as an innovative ion exchange system that uses cation and anion exchange to remove iron hardness and organics from freshwater pumped from the local surficial aquifer. In addition the WTP blends the RO permeate with freshwater from a third source the Sandstone aquifer. This blend then undergoes degasification disinfection and chemical addition. To facilitate additional operational flexibility the WTP can direct Sandstone aquifer water back to the RO treatment system if needed.This blend of traditional and proven innovative technologies combined within a single system provides a dynamic cost-effective treatment facility that increases the LCUs water supply treatment flexibility and reliability while reducing operational and treatment costs by as much as 60 percent. In addition to the primary treatment components the project includes a 15000 sq ft process building a 5000 sq ft office and operations building a standby generator shared chemical systems 7 raw-water sand strainers a backwash waste pumping station 8 UFA wells modifications to 27 existing wells 7 electrical buildings a 2873 ft deep injection well to dispose of treatment concentrate 8 mi of production well piping and 5 mi of service road leading to the production wells.In service since August 2018 the Green Meadows WTP serves an estimated 30000 homes and businesses in south Lee County neighborhoods as well as the Southwest Florida International Airport and Florida Gulf Coast University.