The document discusses SeadafTM, a rapid flotation system for seawater clarification prior to desalination. SeadafTM uses a hydraulic flocculation reactor and patented perforated floor to provide high water circulation velocities and improved bubble adhesion. It is a compact, versatile, and easy to operate alternative to conventional flotation units. Example installations of SeadafTM include pretreatment systems for desalination plants in Barcelona, Spain and Al Dur, Bahrain.

1. Seadaf ™
(RICTOR process)
SEAWATER CLARIFICATION THROUGH DESALINATION
RAPID FLOTATION
OPTIMIZE PRETREATMENT PRODUCTIVITY
P-PPT-D-002-EN-1004
BEFORE DESALINATION

2. DESALINATION
DESSALEMENT
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
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3. DESALINATION
DESSALEMENT
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
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4. WHY USE A MULTI-STAGE PRETREATMENT
DESALINATION
DESSALEMENT 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
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5. Seadaf™ IN DESALINATION DIES
Seadaf™ in conventional clarification systems helps to reduce the
frequency 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 flotation
Seadaf™ 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
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6. DESALINATION
DESSALEMENT
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
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7. Seadaf™: OPERATING PRINCIPLE
1. COAGULATION 2. FLOCULATION HYDRAULIQUE 3. SATURATION:
Ferric chloride or alum. Used to create micro-flocs. 9 -12% recirculation, pressurization
Coagulation 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.
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8. DESALINATION
DESSALEMENT
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 unit
Seadaf™ is versatile:
f Mixer Flocculator
• It supports occasional turbidity
peaks (up to 20 NTU)
• Polymer-free operation possible
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9. DESALINATION
DESSALEMENT
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
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10. DESALINATION
DESSALEMENT
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
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