Seadaf - Optimize pretreatment productivity before desalination

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Seawater clarification through rapid flotation

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Seadaf - Optimize pretreatment productivity before desalination

  1. 1. Seadaf ™ (RICTOR process) SEAWATER CLARIFICATION THROUGH DESALINATION RAPID FLOTATION OPTIMIZE PRETREATMENT PRODUCTIVITYP-PPT-D-002-EN-1004 BEFORE DESALINATION
  2. 2. DESALINATIONDESSALEMENT CONTENTS Seadaf™ Seadaf™ in the fast Flotation Range Why use a Multi-stage Pretreatment System in Seawater Desalination? Seadaf™ in Desalination Dies Seadaf™ in 3 points Operating Principle The Plus of Seadaf™ Among our References 2
  3. 3. DESALINATIONDESSALEMENT FAST FLOTATION RANGE Seadaf™ • Seadaf™ is part of our fast flotation unit range and is dedicated to seawater clarification. RESOURCE PRODUCT NAME PURPOSE Borehole, River, Surface Water Aquadaf™ Aquadaf™ Drinking Water Seawater Purification Seadaf™ Seadaf™ before DMF Treated Water Greendaf™ * Greendaf™ * Environmental Discharge Wastewater or Biofilter Backwash Water Greendaf™ * Greendaf™ * Environmental Discharge *Greendaf™ product is declined in 2 sub-products 3
  4. 4. WHY USE A MULTI-STAGE PRETREATMENTDESALINATIONDESSALEMENT SYSTEM IN SEAWATER DESALINATION? Seadaf™ • At large-scale facilities, onshore wells are replaced by seawater intakes : - This water may carry algae or organic matter loads on a seasonal or permanent basis The warmer the water, the higher the loads (as in Gulf nations) • Need for a conventional or membrane filtration stage before reverse osmosis • Seadaf™ is used to optimize operations at this filtration stage while minimizing associated water loss 4
  5. 5. Seadaf™ IN DESALINATION DIESSeadaf™ in conventional clarification systems helps to reduce thefrequency of filter washing. RO DMF Sea Distribution Water Pre-treatment Coagulation, Clarification Removal of dissolved Screening flocculation, through media salts through Reverse clarification through filtration Osmosis dissolved-air flotationSeadaf™ in membrane-based clarification systems helps to improve membrane flows. UF RO Sea Distribution Water Pre-treatment Coagulation, Clarification Removal of dissolved Screening flocculation, through salts through Reverse clarification through ultrafiltration Osmosis dissolved-air flotation 5
  6. 6. DESALINATIONDESSALEMENT Seadaf™ IN 3 POINTS Seadaf™ Seadaf™ provides an alternative to conventional flotation units by offering: • High (25 m/h) circulation velocities with no degradation in quality of treated water • Improved coalescence and adhesion of bubbles and flocs through a patented perforated-floor system • Hydraulic flocculation reactor means very limited contact between electromechanical equipment and water Conventional Flotation Plug-flow Flocculator 6
  7. 7. Seadaf™: OPERATING PRINCIPLE1. COAGULATION 2. FLOCULATION HYDRAULIQUE 3. SATURATION:Ferric chloride or alum. Used to create micro-flocs. 9 -12% recirculation, pressurizationCoagulation time = 2 + 2 min Flocculation time = 6 min and release assembly. Raw Water Treated Water 6. PERFORATED FLOOR : 5. FLOTATION: Patented Technology. Formation of bubble Velocity 25 m/h blanket in flotation zone. 7
  8. 8. DESALINATIONDESSALEMENT THE PLUS Seadaf™ (1/2) BENEFITS OF Seadaf™ (1/2) Seadaf™Seadaf™ is compact: f • It supports high (25 - 40 m/h) circulation velocities with no degradation of water quality • The rapid flocculation phase takes 5-10 mn. Flash Plug-flow Flotation unitSeadaf™ is versatile: f Mixer Flocculator • It supports occasional turbidity peaks (up to 20 NTU) • Polymer-free operation possible 8
  9. 9. DESALINATIONDESSALEMENT THE PLUS Seadaf™ (2/2) BENEFITS OF Seadaf™ (2/2) Seadaf™Seadaf™ is easy to operate: f • Hydraulic sludge-removal system with minimal water loss • No need for materials to ballast the flocs • No constraints relating to complicated flocculant application (polymers) • Lined saturation tank pre-tested for seawater compatibility Flash Plug-flow Flotation unit Mixer Flocculator • Easy maintenance (few mechanical parts, no lamellar modules) • Simple automated control system • ON/OFF Operation 9
  10. 10. DESALINATIONDESSALEMENT AMONG OUR REFERENCES Seadaf™ Facility Site Name Seadaf™ Treatment Line Production Commissioning Capacity Date Capacity Barcelona 10 X 2,100 m3/h Screening, filtering 200,000 m3/d July 2009 (Spain) Seadaf™, Dual-layer open filters (Pumice), Closed filters (Anthracite), Cartridge filters Reverse Osmosis Al Dur 14 x 1,715 m3/h Seadaf™, 218,000 m3/d Summer 2011 (Bahrain) Seaclean™ Filter dual layer filters, Cartridge filters, 2 reverse-osmosis stages 10

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