Greendaf - Tertiary phosphate removal by rapid flotation
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Greendaf - Tertiary phosphate removal by rapid flotation

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Remove phosphates from wastewater with a reduced consumption of reagents

Remove phosphates from wastewater with a reduced consumption of reagents

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  • 1. Greendaf™ (RICTOR process) TERTIARY PHOSPHATE REMOVAL URBAN BY RAPID FLOTATION WASTEWATER REMOVE PHOSPHATES FROMP-PPT-ER-008-EN-1004 WASTEWATER WITH A REDUCED CONSUMPTION OF REAGENTS 1
  • 2. UrbanWastewater 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. UrbanWastewater 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 THEWastewater 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 PRINCIPLE1. COAGULATION 2. Hydraulic FLOCULATION. 3. SATURATIONFerric 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. UrbanWastewater 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, USACONTEXT: 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), FRANCECONTEXT:• 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 ClarifierDESIGN: Tertiary Tertiary Tertiary• Floatation unit capacity: 590 m3/h Greendaf™ Greendaf™ Greendaf™• Number of Greendaf™ units: 3 9 9