Biological purification by hollow fiber ultrafiltration membranes

1. Ultrafor™
BIOLOGICAL PURIFICATION BY HOLLOW FIBER
ULTRAFILTRATION MEMBRANES
URBAN
WASTEWATER
GUARANTEE THE WATER QUALITY BEYOND
P-PPT-ER-006-EN-1107
THE HIGHEST STANDARDS
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2. Urban
CONTENTS
Wastewater
Ultrafor™
• 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
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3. THE CHALLENGES FACING
Urban
Wastewater U.W.W. TREATMENT
Ultrafor™ 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
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4. THE CHOICE OF MEMBRANES ON U.W.W. (1/3)
Cl2
Primary Biological Clarifier Sand Disinfection
PRE-TREATMENT
sedimentat TANK filter
ion
UF
PRE-TREATMENT
TANK
Biological and membrane filtration
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5. THE CHOICE OF MEMBRANES ON U.W.W. (2/3)
DYNAMIC SEPARATION A PHYSICAL BARRIER
Suspended solids Control over filtration
«leakage» and of the suspended
solids content in
Danger of denitrification
discharges
in the clarifier
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6. THE CHOICE OF MEMBRANES
Urban
Wastewater ON U.W.W. (3/3)
Ultrafor™ 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.
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7. Urban THE MEMBRANE BIOREACTOR RANGE
Wastewater
THE MEMBRANE BIOREACTOR (MBR) RANGE FOR TREATING
Ultrafor™ WASTEWATER IS AVAILABLE IN TWO VERSIONS IN ORDER
TO MEET THE REQUIREMENTS OF ALL CLIENTS.
THE MBR RANGE
Preferential application
Specific
Membrane
Maximum concentration of process
Models Plant size manufacturer
sludge in membrane tank features
recommended
0 to 100,000 p.e. Flat sheet
Ultragreen™ 0 to 20,000 m3/day
15 g/l
membranes
TORAY
Hollow fibers
Ultrafor™ No limits 10 g/l
Out /In filtration
GE
In order to meet market demands
and the specific requirements set in
technical specifications, in the
future, Degrémont will deploy two
complementary membrane
technologies:
Ultragreen™ Ultrafor™
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8. TECHNOLOGIES: THE DEGREMONT CHOICE
Membrane density
Layout (major plants) Backflushing
Membrane energy costs HOLLOW Concentration-related
(high concentrations) FIBERS flow
Maximum sludge
Membrane energy costs
concentration
(low concentration)
In membranes
PLATES
Simplicity Flexibility
(small plants)
Lower pre-treatment
requirements
2 complementary technologies that still form
part of the ultrafiltration sector
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9. 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.
Discharge
Discharge into the
Natural environment
Raw water D
sinfection
é
Pre-treatment UV Diinfection
Reuse
ULTRAFOR
membrane bioreactors
OI
Reverse osmosis
+
- +
-
Electrodialysis
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10. Urban THE MBR PROCESS
Wastewater
Ultrafor™
THE MBR PROCESS COMBINES BIOLOGICAL
PURIFICATION USING ACTIVATED SLUDGE WITH
ULTRAFILTRATION MEMBRANE CLARIFICATION.
Ultrafor™ uses GE ZW500 hollow fiber
membranes.
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11. Urban PROPERTIES OF THE GE MEMBRANES
Wastewater
Ultrafor™
Membrane surface
viewed under the
electronic microscope
Ultrafiltration membrane
(0.04 m),
Hollow fiber membrane with a
reinforced structure,
Material: PVDF (Polyvinylidene
Fluoride, the submerged
membrane polymer), GE membrane
Proven membrane longevity on
many Urban Waste Water sites.
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12. Urban OPERATING PRINCIPLE (1/3)
Wastewater
Ultrafor™
Treated
Water
Raw Water
Pretreatment Sludge
and/or primary Treatment
treatment
(if required)
Retention Biological purification Combined liquid
of solids designed on the basis of clarification
treatment objectives:
using
• Elimination of carbonaceous membranes :
pollution and nitrification,
•Denitrification, • Filtration is carried
•Dephosphatation out by drawing
through the
membrane by gravity
or by pumping.
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13. Urban OPERATING PRINCIPLE (2/3)
Wastewater
Ultrafor™
Biological tank or
dedicated tank
Treated water
Submerged membranes
Suction and
backflushing
pump
Backflushing
reserve Membrane aeration
Filtration Surplus
through suction sludge
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14. Urban OPERATING PRINCIPLE (3/3)
Wastewater
Ultrafor™
A guarantee against clogging
1. MEMBRANE AERATION
Continuous sequencing
2. BACKFLUSHING
Automatically - every 10 minutes
3. MAINTENANCE WASH
Twice weekly – automatic
4. REGENERATION CLEAN
Twice a year
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15. 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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16. DESIGN PRINCIPLE:
Urban
Wastewater BIOLOGICAL TREATMENT
Ultrafor™ 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
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17. Urban DESIGN PRINCIPLE: ULTRAFILTRATION
Wastewater
Ultrafor™ 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
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18. TREATMENT GUARANTEES
THE DISCHARGE QUALITY PRODUCED BY THE Ultrafor™ SOLUTION
GUARANTEES
PARAMETERS QUANTIFICATION LIMITS
DEMANDED
< 50 mg/L
COD (depends on the refractory soluble COD 30 mg.L-1
in the treated water)
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
Meets bathing water and reuse
Disinfection
standards
Helminth eggs Total retention
E. coli 100 /100 ml
Enterococci 50 /100 ml
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19. SUMMARY OF
Urban
Wastewater Ultrafor™ STRENGTHS
Ultrafor™ 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
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20. NUMEROUS REFERENCES
More than 40 references in the world including:
IN FRANCE
IN THE WORLD
Cannes (Aquaviva)
Boulari (New Caledonia)
Bonifaccio
Goronickel (New Caledonia)
Grasse-la-Paoute
Nouméa Baie Sainte Marie
Grasse Roumiguières
Nouméa James Cook
Fitou
Bora-Bora (French Polynesia)
Ile de Bréhat
Calasparra, Murcia (Spain)
Perros Guirec (Kervasclet)
Firgas (Canary Islands)
Carantec Jinamar (Canary Islands)
Ploudalmezeau Morrojable (Canary Islands)
Plouescat Cubbon Park (India)
Baillargues Rozzano (Italy)
La Montagne (Nantes) Mediouna (Morocco)
L'Ile d'Arrault (Orléans) Lusail Doha (Qatar)
La Canourgue Les Diablerets (Switzerland)
Sarzeau (Kergorange) Etc.
Villefranque
Veules-les-Roses
Claye-Souilly
Fontainebleau / Avon
Mers-les-Bains / Le Tréport
Carpentras
Dourdan Ollainville
La Morée (Le Blanc Mesnil)
Petit Bourg (Guadeloupe)
St Barthélémy 20

21. CASE STUDY:
LA MOREE (93), FRANCE
CONTEXT: DESIGN :
• Construction of a 320,000 p.e. • Treatment line:
wastewater treatment plant – Bar screen
– Grit – Grease remover
• Client: Syndicat Interdépartemental – Pre-treatments
pour l’Assainissement de – Primary sedimentation without chemicals
l’agglomération Parisien (SIIAP) – Fine Straining
– Ultrafor™
• To be commissioned in 2012 • Number of ultrafiltration cassettes: 64
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
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22. CASE STUDY:
MEDIOUNA, MOROCCO
CONTEXT: DESIGN :
• Construction of a 40,000 p.e.
wastewater treatment plant • Treatment line:
– 6/10mm bar screen
• Client: LYDEC on behalf of the – Grit – Grease remover
Mediouna municipality – Fine Straining
– Ultrafor™
• To be commissioned at the start of • Number of ultrafiltration cassettes: 4x2
2012
Specific features of the project:
• Membrane surface area: 7,330 m2
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
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