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Desalination Becomes A Reality In Tampa Bay Florida

Desalination Becomes A Reality In Tampa Bay Florida. Jim Jensen Senior Project Manager PB Water Area Manager Parsons Brinckerhoff Quade & Douglas, Inc. San Diego NBWA Water Conference April 2, 2004. Institutional. Tampa Bay Water regional water wholesaler Owns all significant wellfields

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Desalination Becomes A Reality In Tampa Bay Florida

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  1. Desalination Becomes A Reality In Tampa Bay Florida Jim Jensen Senior Project ManagerPB Water Area Manager Parsons Brinckerhoff Quade & Douglas, Inc.San Diego NBWA Water Conference April 2, 2004

  2. Institutional • Tampa Bay Water regional water wholesaler • Owns all significant wellfields • Regional distribution system • New surface WTP • Member governments • Hillsborough, Pasco & Pinellas counties • New Port Richey, St. Petersburg & Tampa • Operate their own WTPs • Retail water distribution systems

  3. Why Desalination Is Needed In Southwest Florida • Years of drought • Overpumping from concentrated wellfields • Environmental stress to wetlands and lakes

  4. SWFWMD Required Reduction In Wellfield Withdrawals • Average of 158 MGD pumped in 1998 • Settlement required reduction in pumping to 121 MGD in 2003 • Further reduction in pumping to 90 MGD by 2008

  5. Master Water Plan • $610 million capital improvement plan • Aggressive water conservation program • Skimmed surface water stored in above ground reservoir • Desalinated seawater • Desalinated brackish water • Limited new groundwater sources

  6. Water Master Plan Requirements • Diversified and sustainable • Limited new groundwater ( reduced total groundwater withdrawal) • Drought resistant • Reasonably priced

  7. Seawater Desalination Procurement Process • Desalinated water supply 20-35 MGD • Board initially not fully committed • Tampa Bay Water did not own a site • Developer responsible for water delivery system to point of connection • Design, Build, Own, Operate, Transfer • Co-funded capital costs by SWFWMD

  8. PROPOSALS • All 5 Pre-Qualified Developers Submitted • Approximately 23 options and alternatives submitted • Three sites proposed • MED, MVC and RO process • Power plant intake and discharge canals used

  9. ANCLOTE POWER PLANT Florida Seawater Desaliantion Company Progress Energy/Ionics HIGGINS POWER PLANT1 Progress Energy Ionics BIG BEND POWER PLANT Enova/SSI2 Florida Water Partners Stone and Webster 1 Higgins Power Plant was eliminated from further consideration. 2 Enova/SSI was not selected for further evaluation. Proposed Desalination Site Locations

  10. Power Plant Co-Location • Shares intake and outfall with power plant once through cooling water system • Tie in to power plant discharge pipeline on land • Increase in temperature increases production of desalinated water • Bay water salinity less than open seawater

  11. Tampa Bay Desalination Facility

  12. Desalinated Water Quality • Meets all local, State and Federal drinking water standards • Chloride maximum 100 mg/L (partial second pass) • Lime added to prevent corrosion • Disinfectant added to prevent biological growth in delivery pipeline

  13. Seawater Concentrate Disposal • 16.7 MGD concentrate mixed with 1,350 MGD cooling water flow = 70:1 • Blended discharge increase ~2% at canal discharge point • NPDES Permit minimum blending ratio 20:1 (1 of 4 generators operating)

  14. Public Acceptance • Extensive public information and education program from proposal process through construction • Public Service Announcements • Editorial Board Presentations • Open House presentations/ Q&A • Focus Groups • Homeowner’s Associations, etc. • 70% Favorable for desalination • Concern about environmental impact • NIMBY

  15. Plant Operational Status • Began water production in March 2003 • Excessive fouling problems • Did not pass Acceptance Tests • Operational and other changes reduce fouling, operational costs still to high • Production averages 22.5 MGD in February 2004 before shutdown for repairs

  16. Plant Institutional Status • Covanta notified of termination of O&M contract in October 2003 • Covanta files for bankruptcy delaying repairs and termination • Board nominates Interim Operations, Maintenance and Management firms • American Water Services/Pridesa • Ionics/Montgomery Watson Harza • Veolia Water (USFilter Operating Services)

  17. Desalination Is A Reality In Tampa Bay • Pretreatment problems resulting in excessive fouling can be fixed • The Tampa facility meets all drinking water standards • The Tampa facility is capable of producing 25 MGD of potable water

  18. Questions?

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