Remove phosphates from wastewater with a reduced consumption of reagents

1. Greendaf™
(RICTOR process)
TERTIARY PHOSPHATE REMOVAL URBAN
BY RAPID FLOTATION WASTEWATER
REMOVE PHOSPHATES FROM
P-PPT-ER-008-EN-1004
WASTEWATER WITH A REDUCED
CONSUMPTION OF REAGENTS
1

2. Urban
Wastewater
CONTENTS
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
2 2

3. Urban
Wastewater
RAPID FLOTATION RANGE
Greendaf™ 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.
Resource Product name Usage
Borehole, River
Surface water Aquadaf™ Drinking Water
Seawater Purification
Seadaf™
before DMF
Treated water Greendaf™*
Environmental
Discharge
Biofilter Backwash Wastewater or
Water Greendaf™*
Environmental Discharge
*Greendaf™ product is declined into 2 sub-products
3 3

4. Urban
Greendaf™ IN THE
Wastewater
TREATED WATER OFFER
Greendaf™
The Greendaf™ is an alternative to the Densadeg ™.
Purified water Greendaf™ Discharge
Biological Secondary Greendaf™
treatment clarifier Dephosphatation
4 4

5. Greendaf™: OPERATING PRINCIPLE
1. COAGULATION 2. Hydraulic FLOCULATION. 3. SATURATION
Ferric chloride or alum Used to create micro flocs. 8 to 10% of recirculation,
Flocculation time = 5 to 7 min Pressurization and pressure
relief system.
6. Hydraulic or mechanical
sludge EVACUATION
Raw
water Treated
water
5. FALSE FLOOR
4. FLOTATION Patented technology.
Formation of bubble Velocity of 20 to
blanket in flotation zone. 30 m/hour
5 5

6. Urban
Wastewater
ADVANTAGES OF THE Greendaf™
THE ADVANTAGES OF Greendaf™
Greendaf™
The Greendaf™ is a flexible product:
– It can produce results of up to 0.1 mg/L.
The Greendaf™ 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 Greendaf™ 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).
6 6

7. Urban
Wastewater
AMONG THE REFERENCES
Greendaf™
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
7 7

8. CASE STUDY:
HUDSON, MA, USA
CONTEXT: DESIGN:
OF THE PLANT:
• Client: Hudson Town, Massachusetts
• Works carried out: 2008-2009 •Capacity: 25,000 m3/day
• Commissioned: autumn 2009 •Treatment line:
• Problems: complying with the Primary sedimentation, bacteria beds,
requirements of the draconian activated sludge tanks, secondary
standard on discharges P<0.1 mg/L clarification, Greendaf™, disinfection.
OF THE FLOATATION UNIT:
REMINDER OF WATER PARAMETERS:
• Greendaf™ with mechanical
Raw water At the Greendaf™ outlet flocculator
Turbidity (NTU)
5 – 22 <1
• Number of Greendaf™ units: 2x22 m2
Total phosphorous
(mg/L)
0.87 – 2.0 < 0.1 • Sludge removed by scraper
8 8

9. CASE STUDY:
EVREUX (27), FRANCE
CONTEXT:
• Construction of a 123,000 p.e. THE WATER LINE:
wastewater treatment plant,
upgradable to 164,000 p.e.. Stone Trap
Screening
• Client: The Evreux urban area
Lifting
• Works carried out: 2010-2011 Straining
• Commissioned: March 2012
• Problems: technical specifications Clarifier Clarifier
applicable to discharges into the (Sedipac 3D) (Sedipac 3D)
receiving medium (discharge level
demanded: Secondary
Treatment
Secondary
Treatment
- phosphorous: 1 mg/L (Trizone) (Trizone)
- suspended solids: 10 mg/L (maximum).
Clarifier Clarifier
DESIGN:
Tertiary Tertiary Tertiary
• Floatation unit capacity: 590 m3/h Greendaf™ Greendaf™ Greendaf™
• Number of Greendaf™ units: 3
9 9