Biological purification of wastewater by combined cultures

1. Meteor™-IFAS
BIOLOGICAL PURIFICATION OF WASTEWATER BY
COMBINED CULTURES URBAN
WASTEWATER
P-PPT-ER-005-EN-1107
REMOVE CARBON AND NITROGEN
WASTEWATER USING A VERY
COMPACT SOLUTION

2. Urban CONTENTS
Wastewater
Meteor™ Meteor™ Range
IFAS
The Meteor™-IFAS Model
Operating Principle
Components Parts of Meteor™-IFAS
Meteor™-IFAS in the Treatment Lines
The Advantages of Meteor™-IFAS
Some References
Case Study: Groton, Connecticut, USA
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3. Urban
Wastewater
Meteor™ RANGE
Meteor™ As part of biological treatment processes, Meteor™ is designed
IFAS for purifying wastewater using mixed cultures.
Meteor™ RANGE
Specific features Activated sludge
Models Preferential Positioning Advantages
of the process For new plants
concentration
(biological tank)
Biofilm Culture • Extremely compact
MBBR
(no AS)
NTK 400 mg/L • Separation (CMDF – DAF)
• Major loading fluctuations
• Mixed culture – Less medium than
With activated for MBBR
IFAS sludge recirculation
NGL 2 g/L
• Rehabilitation – enhances
treatment quality
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4. Urban
Wastewater
THE Meteor™-IFAS MODEL
Meteor™ INNOVATION
IFAS
An intermediary (combined cultures) solution combining the
advantages of fixed-film culture (like biofiltration) and
suspended growth technology (like activated sludge).
• Meteor™-IFAS is designed for treating carbon and nitrogen in
wastewater.
• It is the model based on a biological process with fixed culture on
mobile carriers (IFAS = Integrated Fixed Film Activated Sludge).
• It fits any size of facilities.
• It can be used for the treatment or raw water from urban areas and
the pretreatment of industrial water .
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5. Urban OPERATING PRINCIPLE
Wastewater
Meteor™
IFAS
• Treatment of carbon is made through suspended growth
(actviated sludge) while the nitrogen treatment is made
through attached growth: two different types of biomass
(flocculated biomass and attached biomass) coexist within
the same reactor.
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6. COMPONENT PARTS–
Urban
Wastewater CARRIERS
Meteor™
IFAS 3 different carriers for an adaptation to each
case.
NAME Meteor 660 Meteor 515 Meteor 450
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7. COMPONENTS PARTS –
Urban
Wastewater RETAINING SCREEN
Meteor™ An environmental
IFAS protection
2 versions:
When Meteor™-IFAS is before a When 2 denitrification and nitrification
clarifier: are adjacent:
• Good mix and good mobility of carriers around the screens.
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8. COMPONENTS PARTS–
Urban
Wastewater AERATION
Meteor™
IFAS 2 types of aeration to be adapted to
each situation
Small bubbles Medium bubbles
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9. Urban
Wastewater
Meteor™-IFAS IN THE TREATMENT LINES
Meteor™ The configurations are the same as for activated sludge with
IFAS
the exception of sequenced channel that is not compatible
with the presence of carriers.
The most widely found layouts are shown below:
Carbone only No economic value compared with activated sludge.
Nitrification /
Denitrification
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10. Urban
Wastewater
ADVANTAGES OF Meteor™-IFAS
Meteor™ • Compact:
IFAS Volume needs of the structures are considerably reduced compared to
conventional activated sludge.
• Flexibility:
This process supports strong load variations particularly in cold zones
(ex.: mountainous zones)
• Environment:
An effluent quality that conforms to the strictest regulations on discharge
while controlling costs.
• Easy to operate:
– No load loss or washing,
– A high level of automation which gives maximum reliability to the system,
– Ease of integration within existing stations,
– Ideal of upgrades: raise of the quality level of discharge, as well as the load to be
treated.
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11. Urban SOME REFERENCES
Wastewater
Meteor™
IFAS
FLOWRATE
PLANT NAME WHY STATUS
(m3/d)
Groton, CT, USA 23,000 Rehabilitation In operation
Falling Creek, USA 7,000 Rehabilitation In operation
Proctors Creek, USA 5,000 Rehabilitation In operation
East Providence, USA 54,000 Rehabilitation In operation
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12. CASE STUDY:
GROTON, CT, USA
CONTEXT: DESIGN:
• WWTP refurbishment of • Meteor™ Capacity: 1,890 m3/h
18,900 m3/d capacity. • Number of tanks: 2
• Size of anoxic zone: 1,390 m3
• Client: Groton, Connecticut • Size of aerobic zone: 2,530 m3
• Biofilm carrier fill fraction: 60% in
• Works: 2007 aerobic zone
• Commissioning: 2010 • Number of cylindrical screens :18
(6 per tank)
• Issue: To meet Long Island sounds • Number of anoxic zone mixers: 3
limits by reducing carbon and nitrogen
discharge in the existing aeration tank.
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