Meteor™-IFASBIOLOGICAL PURIFICATION OF WASTEWATER BY

COMBINED CULTURES

REMOVE CARBON AND NITROGEN

WASTEWATER USING A VERY

COMPACT SOLUTION

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CONTENTS

� Meteor™ Range

� 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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Meteor™RANGE

As part of biological treatment processes, Meteor™ is designed for purifying wastewater using mixed cultures.

Meteor™

IFAS

Meteor™RANGE

ModelsSpecific features of the process

Preferential PositioningFor new plants

Activated sludge concentration

(biological tank)

Advantages

MBBRBiofilm Culture

(no AS)NTK 400 mg/L

• Extremely compact• Separation (CMDF – DAF)• Major loading fluctuations

IFASWith activated

sludge recirculationNGL 2 g/L

• Mixed culture – Less medium than for MBBR

• Rehabilitation – enhances treatment quality

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INNOVATION

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 .

THE Meteor™-IFAS MODEL

Meteor™

IFAS

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OPERATING PRINCIPLE

• 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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IFAS

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Meteor™

IFAS

COMPONENT PARTS–

CARRIERS

3 different carriers for an adaptation to each case.

Meteor 660 Meteor 515 Meteor 450NAME

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Meteor™

IFAS

COMPONENTS PARTS –

RETAINING SCREEN

���� An environmental protection

• Good mix and good mobility of carriers around the screens.

2 versions:

When Meteor™-IFAS is before a

clarifier: When 2 denitrification and nitrification are adjacent:

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Meteor™

IFAS

COMPONENTS PARTS–

AERATION

Small bubbles Medium bubbles

���� 2 types of aeration to be adapted to each situation

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Carbone only No economic value compared with activated sludge.

Nitrification /Denitrification

Meteor™-IFAS IN THE TREATMENT LINES

The configurations are the same as for activated sludge with the exception of sequenced channel that is not compatible with the presence of carriers.

The most widely found layouts are shown below:

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IFAS

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ADVANTAGES OF Meteor™-IFAS

•Compact: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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SOME REFERENCES

In operationRehabilitation5,000Proctors Creek, USA

In operationRehabilitation54,000East Providence, USA

PLANT NAMEFLOWRATE

(m3/d)WHY STATUS

Groton, CT, USA 23,000 Rehabilitation In operation

Falling Creek, USA 7,000 Rehabilitation In operation

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CASE STUDY:GROTON, CT, USA

CONTEXT:

• WWTP refurbishment of 18,900 m3/d capacity.

• Client: Groton, Connecticut

• Works: 2007

• Commissioning: 2010

• Issue: To meet Long Island sounds limits by reducing carbon and nitrogen discharge in the existing aeration tank.

DESIGN:

• Meteor™ Capacity: 1,890 m3/h• Number of tanks: 2• Size of anoxic zone: 1,390 m3

• Size of aerobic zone: 2,530 m3

• Biofilm carrier fill fraction: 60% in aerobic zone• Number of cylindrical screens :18 (6 per tank)• Number of anoxic zone mixers: 3