Meteor IFAS - Remove carbon and nitrogen wastewater using a very compact solution
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The document discusses the MeteorTM-IFAS system for biologically treating wastewater. [1] MeteorTM-IFAS uses a combination of suspended growth activated sludge and attached biofilm growth on movable carriers to remove carbon and nitrogen from wastewater. [2] It operates using two types of biomass - flocculated biomass and attached biomass - within the same reactor. [3] A case study highlights how MeteorTM-IFAS was used to rehabilitate a wastewater treatment plant in Groton, Connecticut to help it meet more stringent discharge limits.
Meteor IFAS - Remove carbon and nitrogen wastewater using a very compact solution
- 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 2
- 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 3
- 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 . 4
- 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. 5
- 6. COMPONENT PARTS– Urban Wastewater CARRIERS Meteor™ IFAS 3 different carriers for an adaptation to each case. NAME Meteor 660 Meteor 515 Meteor 450 6
- 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. 7
- 8. COMPONENTS PARTS– Urban Wastewater AERATION Meteor™ IFAS 2 types of aeration to be adapted to each situation Small bubbles Medium bubbles 8
- 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 9
- 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. 10
- 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 11
- 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. 12