OPTIMIZE PRETREATMENT PRODUCTIVITY

BEFORE DESALINATION

Seadaf™(RICTOR process)

DESALINATION

P-PPT-D-002-EN-1004

SEAWATER CLARIFICATION THROUGH

RAPID FLOTATION

DESSALEMENTDESALINATION

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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

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*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.

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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.

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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

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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)

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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)

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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