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CaribDA 2012 Conference & Exposition “80 Years of Desalination Makes For One Happy Island”
in conjunction with
W.E.B. Aruba N.V.’s 80th Anniversary Celebration
19 – 22 June 2012 in Aruba
Using Past Innovation to Drive Current Seawater Desalination
Reverse Osmosis Designs
Holly Johnson Veolia Water Solutions & Technologies
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Agenda
• Background • Case Study
– Sur Oman – Aruba
• Discussion • Conclusion • Acknowledgements • Questions
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Background
• Seawater Desalination: Satisfying Municipal and Industrial Customers for Over 80 Years
• Growing Need for Desalination Worldwide – Water Availability, Industrial Constraints
• New Challenges for Facilities – Technical
• Maintain Efficiency, Online Availability
– Economic • Optimize CAPEX, OPEX
– Environmental • Minimize Marine Impacts
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Background
• Innovations From Past Facility Designs Improved Future Desalination Plants
• Value-Engineer Key Components to Achieve Multiple Objectives
• Case Study: Sur Oman and W.E.B. Aruba
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Sur Oman - Background
• Ministry of the National Economy of the Sultanate of Oman
• Limited Water Resources, Growing Water Needs • Goals:
– Provide Population of 350,000 with Drinking Water – Replace Existing Plant with State of the Art System
• Contract: Design-Bid-Build, 80,000 m3/day, 2007 • Commissioning: 2010 • Operations: Present - 2030
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Sur Oman – Site Location
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Sur Oman – Challenges and Objectives
• Facility Challenges – Technical
• Produce High-Quality Drinking Water • Ensure Consistent Plant Availability
– Economic • Optimize CAPEX, OPEX
– Environmental • Encourage Sustainable Water Supply • Minimize Environmental Impact
• Goal: Optimize Key Components with Greatest Number of Ancillary Benefits
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Sur Oman – Solutions
• Solution #1: Optimize Intake Structure
• Beach Well Expansion – 12 Wells 33 Wells – 70 – 100 L/s Each
• Solution #2: Improve Energy Recovery
• DWEER ERD – 24 units, integrated into
RO building
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Sur Oman – Design Impacts and Improvements
Parameter Impact Improvements
Beach Well Intake
Technical • Improved influent water quality
Economic • 50% reduction in pretreatment requirements • 64% reduction in chemical consumption
Environmental • Reduced potential for adverse impact due to oil spills, red tide
DWEER ERD
Technical • 97% energy recovery achievable Economic • Reduced OPEX
Environmental • Noise levels <85dB, vibration levels reduced
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Aruba – Background
• W.E.B. Aruba • Limited Water Resources, Growing Water Needs • Goals
– Provide Population of 100,000 and 700,000 Annual Tourists with Drinking Water
– Support Local Businesses – Replace Existing Plant with Improved System
• Contract: Design-Build, 24,000 m3/day facility, 2010 • Commissioning: On-going
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Aruba – Site Location
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Aruba – Challenges and Objectives
• Facility Challenges – Technical
• Produce High-Quality Water (TDS < 75 ppm) • Ensure Consistent Plant Availability (95%)
– Economic • Minimize CAPEX, OPEX
– Environmental • Encourage Sustainable Water Supply • Minimize Environmental Impact
• Goal: Leverage Experience from Sur Oman to Achieve Multiple Benefits at Facility
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Aruba – Solution
• Solution #1: Optimize Intake Structure • Beach Well Installation
– 10 Wells – 2,300 m3/hr Each
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Aruba – Design Impacts and Improvements Parameter Impact Improvements
Beach Well Intake
Technical
• MMF backwash cycle eliminated • Membrane lifecycle increased • Cartridge filtration replacement: 3 – 6 months instead of 21 days • Membrane cleaning frequency: every 6 months instead of 21 days • Chemical use reduced
Economic
• Energy costs reduced (< 4 kWh/m3 instead of 4.5 kWh/m3) • CAPEX reduced • Chemical costs reduced
Environmental • Footprint reduced • Minimal impacts on marine life
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Discussion
• Innovation Transfer Can Benefit New Desalination Facilities – Sur Oman Aruba – Beach Well Intakes, Plant Integration Strategies
• Due Diligence Must be Conducted on All Projects – “Best” Solutions May be Limited by Project-Specific
Constraints – Ensure Unique Challenges are Properly Addressed
• Experience an Important Driver for SWRO Designs – Achieve Multi-Faceted Benefits – Encourage New Innovations to Occur
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Conclusion
• Advancements in SWRO over 80 Years • Innovations Offer Opportunity for Design of New
Plants to be Improved • Target Key Processes that Affect Many Objectives:
– Technical – Economic – Environmental
• Consider Unique Challenges for New Facilities • Past Experience Important to Encourage New
Innovations in Future Facilities
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Acknowledgements
• Larry Jessup, Veolia Water Solutions & Technologies • Bernie Mack, Veolia Water Solutions & Technologies • Carla Robinson, Veolia Water Solutions & Technologies • Ron Sebek, Veolia Water Solutions & Technologies • Paul Choules, Water Standard
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Questions?