ultrafor - guarantee the water quality beyond the highest standards
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Ultrafor™
URBAN
WASTEWATER
GUARANTEE THE WATER QUALITY BEYOND
THE HIGHEST STANDARDS
BIOLOGICAL PURIFICATION BY HOLLOW FIBER
ULTRAFILTRATION MEMBRANES
P-PPT-ER-006-EN-1107
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CONTENTS
• The challenges and choice of membranes for U.W.W. (Urban Wastewater) treatment
• The Membrane Bioreactor Range
• Membrane technologies: the Degrémont choice
• The Ultrafor™ utilization area
• The MBR Process
• Properties of the GE Membranes used in the Ultrafor™
• Operating Principle
• Design Principle
• Advantages of the Ultrafor™
• Case Study: La Morée (93), France
• Case Study: Mediouna, Morocco
Ultrafor™
Urban
Wastewater
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THE CHALLENGES FACING U.W.W. TREATMENT
Increasingly stringent discharge standards• Health & safety (water standards)• Protecting the natural environment (European
framework directive)
Protecting water resources• Reuse (irrigation, etc.)
Special limitations• Site limitations (available area), • Rehabilitation limitations• Operational limitations
Ultrafor™
Urban
Wastewater
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THE CHOICE OF MEMBRANES ON U.W.W. (1/3)
Cl2
Primary sedimentat
ion
ClarifierBiological TANK
Sand filter
Disinfection
UF
PRE-TREATMENT
PRE-TREATMENT
TANKBiological and membrane filtration
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THE CHOICE OF MEMBRANES ON U.W.W. (2/3)
DYNAMIC SEPARATION A PHYSICAL BARRIER
Suspended solids «leakage»
Danger of denitrificationin the clarifier
Control over filtration and of the suspended
solids content in discharges
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THE CHOICE OF MEMBRANES ON U.W.W. (3/3)
Compact design: • For the same target water quality, membranes can
replace several conventional treatment stages.
Integration:
• Architectural: structures are more compact, so that the
architectural constraints are easier to meet.
Performances:
• Membranes form a physical barrier; water quality is
constant and therefore unaffected by fluctuating
hydraulic loading.
Ultrafor™
Urban
Wastewater
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THE MEMBRANE BIOREACTOR (MBR) RANGE FOR TREATING WASTEWATER IS AVAILABLE IN TWO VERSIONS IN ORDER TO MEET THE REQUIREMENTS OF ALL CLIENTS.
THE MEMBRANE BIOREACTOR RANGE
In order to meet market demands and the specific requirements set in technical specifications, in the future, Degrémont will deploy two complementary membrane technologies:
Ultrafor™Ultragreen™
Ultrafor™
Flat sheetmembranes
Specificprocess features
Preferential application
0 to 100,000 p.e.
THE MBR RANGE
15 g/l
Plant sizeModels Maximum concentration of sludge in membrane tank recommended
Ultragreen™
Hollow fibersOut /In filtration
No limitsUltrafor™ 10 g/l
TORAY
Membranemanufacturer
GE
0 to 20,000 m3/day
Urban
Wastewater
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TECHNOLOGIES: THE DEGREMONT CHOICE
�2 complementary technologies that still form
part of the ultrafiltration sector
PLATES
HOLLOW FIBERS
Membrane density
Backflushing
Concentration-related flow
Membrane energy costs(low concentration)
Flexibility(small plants)
Lower pre-treatment requirements
Simplicity
Maximum sludge concentrationIn membranes
Membrane energy costs(high concentrations)
Layout (major plants)
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THE Ultrafor™AREA OF UTILIZATION
Ultrafor™ is suitable for Urban Wastewater and Industrial Wastewater treatment. It achieves a quality of effluent that meets the requirements of the most stringent standards on discharge or that can be recycled for reuse.
Pre-treatment
Raw water Désinfection
UV Diinfection
Discharge into the
Natural environment
OI
Reverse osmosis
+-+
-
+-+
-
Electrodialysis
ULTRAFOR
membrane bioreactors
Reuse
Discharge
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THE MBR PROCESS
THE MBR PROCESS COMBINES BIOLOGICAL
PURIFICATION USING ACTIVATED SLUDGE WITH
ULTRAFILTRATION MEMBRANE CLARIFICATION.
Ultrafor™ uses GE ZW500 hollow fiber membranes.
Ultrafor™
Urban
Wastewater
11
GE membrane
Ultrafiltration membrane
(0.04 µm),
Hollow fiber membrane with a
reinforced structure,
Material: PVDF (Polyvinylidene
Fluoride, the submerged
membrane polymer),
Proven membrane longevity on
many Urban Waste Water sites.
Membrane surface viewed under the
electronic microscope
PROPERTIES OF THE GE MEMBRANES
Ultrafor™
Urban
Wastewater
12
OPERATING PRINCIPLE (1/3)
Ultrafor™
Retention of solids
Biological purification designed on the basis of treatment objectives:
• Elimination of carbonaceous pollution and nitrification,•Denitrification,•Dephosphatation
Combined liquid clarification using membranes :
• Filtration is carried out by drawing through the membrane by gravity or by pumping.
Pretreatment and/or primary
treatment (if required)
SludgeTreatment
Raw Water
TreatedWater
Urban
Wastewater
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Ultrafor™
Filtration through suction
OPERATING PRINCIPLE (2/3)
Treated water
Biological tank or dedicated tank
Submerged membranes
Membrane aeration
Surplus sludge
Backflushingreserve
Suction and backflushing
pump
Urban
Wastewater
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1. MEMBRANE AERATIONContinuous sequencing
2. BACKFLUSHINGAutomatically - every 10 minutes
3. MAINTENANCE WASHTwice weekly – automatic
4. REGENERATION CLEANTwice a year
���� A guarantee against cloggingUltrafor™
OPERATING PRINCIPLE (3/3)Urban
Wastewater
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DESIGN PRINCIPLE:
PRE-TREATMENT
Bar screen
Grit – grease remover
Buffer capacity (upstream or in the biological section):• Optimizing membrane design
Fine straining:• For membrane protection • Hollow fibers: 1 mm
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DESIGN PRINCIPLE:
BIOLOGICAL TREATMENT
Designed to eliminate carbon and for nitrification treatment:• → Good activated sludge filtration capacity,• More thorough treatment if required (denitrification,
biological and physical-chemical dephosphatation)
The biological reactor:• Sequenced channel or plug flow• Anoxia at the inlet or sequential aeration
Activated sludge concentration (6 to 12 g.L-1) in the biological unit:• The high concentration option is the result of
a technical-economic compromise that depends on client objectives and limitations
Ultrafor™
Urban
Wastewater
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DESIGN PRINCIPLE: ULTRAFILTRATION
The design and installation of membranes affect their longevity
Design data required:• A knowledge of hydraulic conditions
–An annual average,–A monthly maximum (30 days),–A weekly maximum (7 days),–A daily maximum (24 hours),–Hourly peaks.
• Membrane design can be optimized when there is the possibility of using a buffer capacity for evening out hourly peaks
Urban
Wastewater
Ultrafor™
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TREATMENT GUARANTEES
THE DISCHARGE QUALITY PRODUCED BY THE Ultrafor™ SOLUTION
PARAMETERSGUARANTEES
DEMANDEDQUANTIFICATION LIMITS
COD< 50 mg/L
(depends on the refractory soluble COD in the treated water)
30 mg.L-1
BOD < 10 mg/L 3 mg.L-1
SUSP. SOLIDS < 3-5 mg/L 3 mg/L
Turbidity 2 NTU 0.5 NTU
NGL 10mg/L, 15 mg/L
Disinfection Meets bathing water and reuse standards
Helminth eggs Total retention
E. coli 100 /100 ml
Enterococci 50 /100 ml
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SUMMARY OF Ultrafor™ STRENGTHS
A quality effluent that provides a solution to problems involving:• The protection of the natural environment and its
biodiversity & Health safety => Discharges• The conservation of potable water resources => Water
reuse
Extremely compact:• Minimized footprint, reduced amounts of civil works• Easily put in place when extending a plant that is
undergoing rehabilitation works
Optimized energy consumption:• Maximized transfers of oxygen from biological treatment • Minimized membrane aeration
Ultrafor™
Urban
Wastewater
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NUMEROUS REFERENCES
More than 40 references in the world including:
Bonifaccio
Petit Bourg (Guadeloupe)
La Morée (Le Blanc Mesnil)
Veules-les-Roses
Claye-Souilly
Fontainebleau / Avon
Mers-les-Bains / Le Tr éport
Carpentras
Dourdan Ollainville
St Barthélémy
IN FRANCE
Cannes (Aquaviva)
Grasse-la-Paoute
Grasse Roumigui ères
Fitou
Ile de Br éhat
Perros Guirec (Kervasclet)
Carantec
Ploudalmezeau
Plouescat
Baillargues
La Montagne (Nantes)
L'Ile d'Arrault (Orl éans)
La Canourgue
Sarzeau (Kergorange)
Villefranque
Bora-Bora (French Polynesia)
Calasparra, Murcia (Spain)
Firgas (Canary Islands)
Jinamar (Canary Islands)
Morrojable (Canary Islands)
Cubbon Park (India)
Rozzano (Italy)
Mediouna (Morocco)
Lusail Doha (Qatar)
Les Diablerets (Switzerland)
Etc.
IN THE WORLD
Boulari (New Caledonia)
Goronickel (New Caledonia)
Noum éa Baie Sainte Marie
Noum éa James Cook
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CASE STUDY:LA MOREE (93), FRANCE
CONTEXT:
• Construction of a 320,000 p.e. wastewater treatment plant
• Client: Syndicat Interdépartementalpour l’Assainissement de l’agglomération Parisien (SIIAP)
• To be commissioned in 2012
Specific features of the project:
–Reinstating the Morée-Croult water mass sound ecological potential
–Producing sludge compatible with the various treatment solutions
–Creating a "zero nuisance« site–Addressing the overall costs concept–Contributing to sustainable
development
DESIGN :
• Treatment line: – Bar screen – Grit – Grease remover– Pre-treatments– Primary sedimentation without chemicals – Fine Straining– Ultrafor™
• Number of ultrafiltration cassettes: 64
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CASE STUDY:MEDIOUNA, MOROCCO
CONTEXT:
• Construction of a 40,000 p.e. wastewater treatment plant
• Client: LYDEC on behalf of the Mediouna municipality
• To be commissioned at the start of 2012
Specific features of the project:
As part of its sustainable development and resource conservation policy, the client wanted:
– a real showcase wastewater treatment plant (1st wastewater treatment plant of its type in North Africa)– to be able to make immediate use of water delivered by the Ultrafor™ for agricultural purposes
DESIGN :
• Treatment line: – 6/10mm bar screen– Grit – Grease remover– Fine Straining – Ultrafor™
• Number of ultrafiltration cassettes: 4x2
• Membrane surface area: 7,330 m2
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