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Seawater clarification through rapid flotation
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OPTIMIZE PRETREATMENT PRODUCTIVITY
BEFORE DESALINATION
Seadaf™(RICTOR process)
DESALINATION
P-PPT-D-002-EN-1004
SEAWATER CLARIFICATION THROUGH
RAPID FLOTATION
DESSALEMENTDESALINATION
2
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
DESSALEMENTDESALINATION
3
*Greendaf™ product is declined in 2 sub-products
FAST FLOTATION RANGE
Seadaf™
Borehole, River,
Surface Water
Treated Water
Seawater
RESOURCE PURPOSE
Seadaf™Seadaf™
Greendaf™ *Greendaf™ *
PRODUCT NAME
Greendaf™ *Greendaf™ *
Drinking Water
Environmental Discharge
Purification
before DMF
Wastewater or
Environmental DischargeBiofilter Backwash Water
Aquadaf™Aquadaf™
• Seadaf™ is part of our fast flotation unit range and is dedicated to seawater clarification.
DESSALEMENTDESALINATION
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• 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
WHY USE A MULTI-STAGE PRETREATMENT
SYSTEM IN SEAWATER DESALINATION?
Seadaf™
5
Seadaf™ IN DESALINATION DIES
Seadaf™ in conventional clarification systems helps to reduce the frequency of filter washing.
Pre-treatment Screening
Coagulation, flocculation, clarification throughdissolved-air flotation
Removal of dissolved salts through Reverse Osmosis
RO
Clarification through media filtration
DMFDistributionSea
Water
Pre-treatment Screening
Coagulation, flocculation, clarification throughdissolved-air flotation
UF
Clarification through ultrafiltration
RO
Removal of dissolved salts through Reverse Osmosis
DistributionSeaWater
Seadaf™ in membrane-based clarification systems helps to improve
membrane flows.
DESSALEMENTDESALINATION
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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
Seadaf™ IN 3 POINTS
Seadaf™
Plug-flow Flocculator
Conventional Flotation
7
Seadaf™: OPERATING PRINCIPLE
Raw Water
TreatedWater
1. COAGULATIONFerric chloride or alum.Coagulation time = 2 + 2 min
2. FLOCULATION HYDRAULIQUEUsed to create micro-flocs. Flocculation time = 6 min
3. SATURATION:9 -12% recirculation, pressurization and release assembly.
5. FLOTATION:Formation of bubble blanket in flotation zone.
6. PERFORATED FLOOR :Patented Technology. Velocity 25 m/h
DESSALEMENTDESALINATION
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BENEFITS OF Seadaf™ (1/2)
Seadaffff™ isisisis compact:compact:compact:compact:• It supports high (25 - 40 m/h) circulation velocities with no degradation of water quality
• The rapid flocculation phase takes 5-10 mn.
Seadaffff™ isisisis versatile:versatile:versatile:versatile:• It supports occasional turbidity peaks (up to 20 NTU)
• Polymer-free operation possible
Flash Mixer
Plug-flowFlocculator Flotation unit
Seadaf™
THE PLUS OF Seadaf™ (1/2)
DESSALEMENTDESALINATION
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BENEFITS OF Seadaf™ (2/2)
Seadaffff™ is easy to operate:is easy to operate:is easy to operate:is easy to operate:• 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
• Easy maintenance (few mechanical parts, no lamellar modules)
• Simple automated control system
• ON/OFF Operation
Flash Mixer
Plug-flowFlocculator Flotation unit
Seadaf™
THE PLUS OF Seadaf™ (2/2)
DESSALEMENTDESALINATION
10
AMONG OUR REFERENCES
Seadaf™
Site NameSeadaf™
CapacityTreatment Line
Facility
Production
Capacity
Commissioning
Date
Barcelona(Spain)
10 X 2,100 m3/h Screening, filteringSeadaf™, Dual-layer open filters (Pumice),
Closed filters (Anthracite),
Cartridge filtersReverse Osmosis
200,000 m3/d July 2009
Al Dur(Bahrain)
14 x 1,715 m3/h Seadaf™, Seaclean™ Filter dual layer filters, Cartridge filters,2 reverse-osmosis stages
218,000 m3/d Summer 2011