1

REMOVE PHOSPHATES FROM

WASTEWATER WITH A REDUCED

CONSUMPTION OF REAGENTS

Greendaf™(RICTOR process)

URBAN

WASTEWATER

TERTIARY PHOSPHATE REMOVAL

BY RAPID FLOTATION

P-PPT-ER-008-EN-1004

22

CONTENTSUrban

Wastewater

Greendaf™

� Greendaf™ in the rapid Flotation Range

� Greendaf™ in the treated Water Offer

� Operating Principle

� Advantages of Greendaf™

� Among our References

� Case Study: Hudson, MA, USA

� Case study: Evreux, FRANCE

33

RAPID FLOTATION RANGE

As part of the line of rapid flotation solutions, the Greendaf™ is the product dedicated to the dephosphatation of purified water.

The Greendaf™ described here is the plug flow version.

Urban

Wastewater

Greendaf™

Drinking WaterBorehole, River

Surface water

Greendaf™*Environmental

DischargeTreated water

Seadaf™Purification

before DMFSeawater

Resource Usage

Greendaf™*Wastewater or

Environmental Discharge

Biofilter Backwash

Water

Product name

Aquadaf™

*Greendaf™ product is declined into 2 sub-products

44

Greendaf™ IN THE

TREATED WATER OFFER

The Greendaf™ is an alternative to the DensadegDensadegDensadegDensadeg™....

Greendaf™

Biological treatment

Secondary clarifier

Greendaf™

Dephosphatation

Purified water Discharge

Urban

Wastewater

Greendaf™

55

Greendaf™: OPERATING PRINCIPLE

Raw water Treated

water

1. COAGULATIONFerric chloride or alum

2. Hydraulic FLOCULATION. Used to create micro flocs. Flocculation time = 5 to 7 min

3. SATURATION8 to 10% of recirculation, Pressurization and pressure relief system.

5. FALSE FLOORPatented technology. Velocity of 20 to 30 m/hour

6. Hydraulic or mechanical sludge EVACUATION

4. FLOTATIONFormation of bubble blanket in flotation zone.

66

THE ADVANTAGES OF THE Greendaf™

The The The The Greendaf™ is a flexible product:is a flexible product:is a flexible product:is a flexible product:

– It can produce results of up to 0.1 mg/L.

The The The The Greendaf™ is a competitive product:is a competitive product:is a competitive product:is a competitive product:

– A new design for the flocculation stage, it can be used to:• reduce the time required for the reaction

to between 5 and 7 minutes;• Reduce the size of structures while

maintaining its performance levels.

The The The The Greendaf™ product is easily operated:product is easily operated:product is easily operated:product is easily operated:

– Easy maintenance (few mechanical components, no lamellar modules);

– No need to inject matter for floc ballasting;– No major risks linked to a fault or a lack of

polymers;– Polymers are only used occasionally (in the

event of suspended solids peaks).

ADVANTAGES OF Greendaf™Urban

Wastewater

Greendaf™

77

Site name Output Date commissioned

Hudson, USA 2 ×××× 725 m³/h Autumn 2009

Evreux (27), France 3 x 590 m³/h Autumn 2011

Roux-Canal, Belgium 1 ×××× 720 m³/h Start of 2012

AMONG THE REFERENCESUrban

Wastewater

Greendaf™

88

CASE STUDY:HUDSON, MA, USA

CONTEXT:

• Client: Hudson Town, Massachusetts• Works carried out: 2008-2009• Commissioned: autumn 2009• Problems: complying with the

requirements of the draconian standard on discharges P<0.1 mg/L

DESIGN:

OF THE PLANT:

•Capacity: 25,000 m3/day•Treatment line:Primary sedimentation, bacteria beds, activated sludge tanks, secondary clarification, Greendaf™, disinfection.

OF THE FLOATATION UNIT:

• Greendaf™ with mechanical flocculator

• Number of Greendaf™ units: 2x22 m2

• Sludge removed by scraper

REMINDER OF WATER PARAMETERS:

Turbidity (NTU)Raw water

5 – 22

At the Greendaf™ outlet

<1

Total phosphorous (mg/L)

0.87 – 2.0 < 0.1

99

CASE STUDY:EVREUX (27), FRANCE

CONTEXT:

• Construction of a 123,000 p.e. wastewater treatment plant, upgradable to 164,000 p.e..

• Client: The Evreux urban area

• Works carried out: 2010-2011• Commissioned: March 2012• Problems: technical specifications

applicable to discharges into the receiving medium (discharge level demanded:

- phosphorous: 1 mg/L - suspended solids: 10 mg/L (maximum).

DESIGN:

• Floatation unit capacity: 590 m3/h

• Number of Greendaf™ units: 3

THE WATER LINE:

Stone Trap

Screening

Lifting

Straining

Clarifier(Sedipac 3D)

Clarifier(Sedipac 3D)

Secondary Treatment(Trizone)

Secondary Treatment(Trizone)

Clarifier Clarifier

Tertiary

Greendaf™Tertiary

Greendaf™Tertiary

Greendaf™