Setawwa 2010, 29-58 choules
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This document provides information on the largest beach well seawater catchment facilities and desalination plant in the world. It includes details such as 32 vertical beach wells split into 3 clusters that can pump 220,000 cubic meters per day. It also describes the pretreatment, reverse osmosis, and post-treatment processes including 5 dual media pressure filters, 8 reverse osmosis first pass trains equipped with 7300 membranes, and 4 reverse osmosis second pass trains for boron removal using 2800 selective membranes. Plant diagrams and a 3D view are also included.
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Setawwa 2010, 29-58 choules
- 1. Beachwells Largest Beachwell Seawater Catchment Facilities in the World, Catchment Facilities in the World, • 32 Vertical beachwells split into 3 clusters, • 5 hectars of Karstic costal land dedicated to beachwells, t b h ll • 220,000 cubic meters per day of nominal pumping capacity, • 80 meters depth wells individually, • Very low Silt Density Index of the raw water.
- 2. Pressure Filters Pressure Filters High Speed Filtration Units for Seawater Pre‐treatment • 5 Dual Media pressure Filters Filters, • 9 Single Media Filters, • 11 Cartridge Filters for pre‐treated water polishing. g p p g
- 3. Reverse Osmosis Reverse Osmosis 8 Reverse Osmosis first pass trains • 8 individual trains on first pass equipped with 7300 reverse osmosis membranes, • 8 individual high efficiency work exchangers for energy recovery recovery, • 8 high voltage high pressure pumps for permeate production 4 Reverse Osmosis second pass trains for Boron removal • Double stage trains for water recovery improvement, • 4 i di id l t i individual trains equipped with 2800 i d ith reverse osmosis selective membranes for Boron removal
- 5. Sydney SWRO 250,000 m3/D (66 MGD) 2007 –2010 US$0.8 Billion (plant/intake/outfall US$0 8 Billion (plant/intake/outfall only) Design & Construct
- 6. Sydney Client: Sydney Water Corporation (SWC) Type of Contract: Design, Build & Operate Product Flow: 66 MGD (250 ML/Day) Product Quality: <115 ppm TDS, 0.4 ppm Boron Product Quality: <115 ppm TDS 0 4 ppm Boron • Provides 15% of the total water to Sydney • Three (3) permits required ( )p q
- 7. Kurnell Residents Towra Point ( Ramsar Wetland) Caltex Refinery Caltex Refinery Approx 300m Inlet Risers Inlet Riser Serenity Cove Film Studios Botany Bay National Park Approx Site Tunnels Boundary (Approx alignment) Desalination Plant Construction Site Outlet Risers Riser
- 10. Sydney
- 11. Pretreatment Operation at 33% 66% with all filters online – 33%-66% • > low filtration rate (<4m/h) • SDI<3, filtration cycles > 55 hours SDI 3, • No acid dosing => better Boron rejection on the 1st pass and less NaOH dosing Operating at 100% • Filtration rate 6.7 m/h • Filtration cycle >40 hours • SDI < 3 at all times • F i sulfate dose-rate 7-9 mg/L Ferric lf t d t 79 /L • Influent turbidity 2 NTU, up to 10 NTU during shock chlorination
- 12. Fujairah 2 SWRO/MED j / Hybrid Plant ‐ SWRO 136,000 m3/D (36 MGD) – MED 455,000 m3/D (120 MGD) – combined 156 MGD 2007 2010 2007 –2010 US$860 Million (SWRO & MED) Design & Construct
- 15. Process
- 20. Kindasa : Plant Overview Kindasa : Plant Overview Brine to Outfall Self cleaning Strainers g N pment 1st pass RO Acid storage and s pre treatment pre treatment st Pass HP Pumps e dosing equip chemical dosing & Boosters Lime 1s Raw Seawater in Pre treatment Chemical dosing Seawater Intake Post treatment Post treatment Backwash 2nd pass RO O Chemical dosing Backwash Tank Raw Seawater Pumps Filtered Seawater Ultra‐filtered Seawater Substation MV & LV Switchgear Permeate Admin & Control Building Variable Speed drives Brine Product to Storage Tank MV/LV Transformers HV/MV Transformers 150m
- 21. Ashkelon – 326,000 m3/Day (86 MGD) SWRO
- 23. Considerations Pre‐treatment options Evolving technologies Short term Medium term Long term Costingg Siting
- 25. Desal Plants, Evolving Technologies Desal Plants, Evolving Technologies Short term •E i i Existing technologies, minor improvements h l i i i • Brine management, i.e. ZDD Medium term M di t • Nano‐membranes (up to 15% reduction in energy), huge impact on the over 100,000 SWRO membranes we have installed , worldwide Long term • Forward osmosis • Alternate membranes • Bi‐products from brine
- 26. Financial Considerations, Capex Financial Considerations, Capex Identifying obstacles to cost‐effective operations Large scale vs. smaller scale plants L l ll l l Location • Cost of land • Proximity to existing potable water distribution network • P i it t l t i l Proximity to electrical power network t k Public Outreach Plant Availability Intake & Pre‐treatment Selection • Subsurface vs. open intake • Quality of water with incidence on number of process steps Environmental & Permitting Concerns associated with above
- 27. Financial Considerations, Opex Financial Considerations, Opex Up to 50% of the Opex costs can be in energy consumption Energy Consumption • Minimize the process train, eliminate pumps • Use latest proven energy recovery devices • Plan for future developments (i.e. membranes, etc) b ) • Length and head losses of distribution network Chemical Consumption Chemical Consumption • Reduce the amount of chemicals needed by minimizing the pre‐ treatment process • Minimize the amount of waste created Others • Consider life cycle costs when designing y g g and constructing the plant
- 28. Citing Selection & Challenges Citing Selection & Challenges Subsurface intake • Reduces power consumption by 5‐10% • Reduces chemical consumption by 5‐10% •R d Reduces the overall footprint of the plant by 10‐20% th ll f t i t f th l t b 10 20% • Reduces impingement & entrainment issues Existing Potable water network Existing Potable water network • Reduces overall cost • Permitting and land issues Permitting and land issues Existing Power network • Reduces overall cost Reduces overall cost
- 29. Conclusion No single pre‐treatment for all applications N i l t t tf ll li ti Incorporate lessons learnt Adapt to local environment & culture Ad t t l l i t & lt THANK YOU