The fine-bubble E-FLEX®-Aeration System is characterized by a highly efficient oxygen transfer, a robust and low-maintenance design and flexible application options in municipal wastewater treatment.
E-FLEX®-Aeration System
Product Information
The requirements for a highly efficient, robust and versatile aeration system led to the development of the E-FLEX®-Aeration System.
The E-FLEX®-Aeration System has the following advantages and properties:
- Freely oscillating hose membranes ensure the highest possible oxygen transfer efficiency through an extremely fine-bubble aeration pattern
- Robust construction
- By using a lifting kit and pre-assembled modules, installation is extremely quick and easy, even in filled basins
- The modular design enables flexible design and, if necessary, retrofitting of existing installations
- A large usable control range and a modular concept enable flexible operational management
| Designation | Value |
| Air Volume | 50 – 215 Nm³/h/Module |
Membrane Material | EPDM or Silicone |
| Frame Material | 1.4301 or1.4571 |
| Membranes per Module | 12 / 18 |
| Active Membrane Area | 3,3 or 5 m²/Module |
| Bubble Diameter | 1 – 3 mm |
| Pressure Drop | 60 – 90 mbar |
Morelia, Mexico
Plant: WWTP Morelia, Mexico
Type of Plant: Municipal Wastewater Treatment Plant
Start-up Year: 2006
Application:
- Aeration for BOD elimination and nitrification
Scope of Delivery:
Steegenwiesen, Germany
Plant: WWTP Stollberg-Steegenwiesen, Germany
Type of Plant: Municipal Wastewater Treatment Plant
Start-up Year: 1997
Application:
- Aeration for BOD elimination and nitrification
Scope of Delivery:
Geminis Zibatá, Mexico
Plant: WWTP Geminis Zibatá, Mexico
Type of Plant: Municipal Wastewater Treamtment Plant
Start-up Year: 2016
Application:
- Aeration for BOD elimination and nitrification
- Flow acceleration and homogenization in an anoxic/aerobic circulation basin
- Suspension and Homogenization for denitrification in anoxic basins
- Sludge aeration
Scope of Delivery:
Příbram, Czech Republic
Plant: WWTP Příbram, Czech Republic
Type of Plant: Municipal Wastewater Treatment Plant
Start-up Year: 2006/2007
Application:
- Aeration for BOD elimination and nitrification
- Suspension and homogenization for denitrification in anoxic tanks and degassing basins
Scope of Delivery:
Fersinsa, Mexico
Plant: WWTP Fersinsa Gist-Brocades, Mexico
Type of Plant: Industrial Wastewater Treatment
Start-up Year: 2002
Applications:
- Aeration for BOD elimination and nitrification
Scope of Delivery:
- 292 E-FLEX®-Aeration Systems
- 6 HYPERCLASSIC®-Mixers
- Engineering & Design
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Aeration Systems for Modern Wastewater Treatment
Applications of the INVENT E-FLEX®– Aeration System
BOD/COD degradation
Efficient oxygen supply to microorganisms for biological pollutant reduction:
The easy-to-install E-FLEX®-Aeration System delivers the required oxygen with high efficiency, leading to reduced operating costs. Optionally, the E-FLEX®-Aeration System can also be designed to be removable.
Intermittent aeration
Through intermittent aeration combined with modern measurement, control, and regulation technology, the energy demand of a wastewater treatment plant can be significantly reduced, while maintaining stable operation with consistently low effluent values. The clog-free E-FLEX®-Aeration System is ideally suited for intermittent operation.
The E-FLEX®-Aeration System is perfectly suited for intermittent operation because the membrane openings reliably and completely close when aeration is turned off. This eliminates the risk of activated sludge entering the aerators and clogging the membranes.
Facultative aeration
The facultative aeration allows for providing additional nitrification capacity seasonally or during peak loads to reliably remove ammonium. Aerators in facultatively aerated tanks must operate reliably after extended periods without air supply.
With proper maintenance, the E-FLEX®-Aeration System can easily withstand longer downtimes and is available as an efficient aerator when needed.
Nitrification
Nitrification describes the bacterial conversion of ammonia (NH3) or ammonium ions (NH4+) into nitrate (NO3−). This process occurs in two steps: first, ammonia is oxidized to nitrite, followed by the oxidation of nitrite to nitrate.
The E-FLEX®-Aeration System delivers the required oxygen with high efficiency, thereby minimizing operating costs.
Membrane bioreactor (MBR)
Continuous cleaning of the membrane surface and uniform aeration help limit the thickness of the biofilm layer. This is crucial for the activity of biological microorganisms responsible for breaking down organic substances in the wastewater.
Membrane bioreactors (MBRs) often have elevated biomass concentrations, which significantly reduce the oxygen transfer efficiency in the wastewater, known as the alpha factor.
Thanks to its high efficiency and automatic maintenance capability, the E-FLEX®-Aeration System is well suited for MBR systems.
