Aerators
CM Aquatechnik supplies fine-bubble membrane disc and tube diffusers for biological aeration in activated sludge, MBR, and SBR treatment tanks. EPDM and polyurethane membrane diffusers achieve oxygen
Technical Specifications
| Diffuser Types | Membrane disc · tube · plate |
| Membrane Material | EPDM (standard) · Polyurethane (high-flex) |
| Pore Size | < 500 µm (fine bubble) |
| Bubble Size | 1 – 3 mm diameter |
| SOTE (% per metre) | 6 – 8% |
| Air Flow per Diffuser | 0.5 – 8 Nm³/h |
| Operating Depth | 3 – 8 m (standard) |
| Disc Diameter | 230 mm · 270 mm · 300 mm |
| Tube Length | 500 mm · 750 mm · 1,000 mm |
| Standards | CE · ATV-DVWK-M 209 |
Key Features
- EPDM membrane achieves > 99% bubble uniformity for efficient oxygen transfer
- Patented non-return check valve prevents sludge backflow when air is off
- Polyurethane membranes for oily or greasy wastewater service
- Drop-in replacement for FLEXAZÓN, SANITAIRE, and other major brands
- Anchor saddles and diffuser holders in PP, HDPE, or SS316L
- Full air distribution piping design and supply available
Applications
- Activated sludge aeration tanks
- MBR bioreactor aeration
- SBR (sequencing batch reactor) aeration
- Nitrification and denitrification tanks
- Sludge aerobic digestion
- Lagoon destratification
Product Overview
CM Aquatechnik supplies fine-bubble membrane disc and tube diffusers for biological aeration in activated sludge, MBR, and SBR treatment tanks. EPDM and polyurethane membrane diffusers achieve oxygen transfer efficiency (OTE) of 6–8% per metre submergence, typically 20–35% standard oxygen transfer efficiency (SOTE) — significantly higher than coarse-bubble systems.
Frequently asked questions
Should I choose disc, tube or plate diffusers?
All three types provide fine-bubble aeration with bubbles of 1–3 mm. Discs are available in 230, 270 and 300 mm diameters and tubes in 500, 750 and 1,000 mm lengths; the choice depends on tank geometry, the required air flow and the preferred grid layout.
EPDM or polyurethane membranes: which is better?
EPDM is the standard membrane material for municipal and most industrial activated sludge applications. Polyurethane membranes are recommended for oily or greasy wastewater, where they offer better resistance than EPDM.
How many diffusers does an aeration tank need?
The number of diffusers is calculated from the oxygen demand of the process, the water depth (typically 3–8 m) and the air flow per diffuser, which ranges from 0.5 to 8 Nm³/h. We can also design and supply the complete air distribution piping to suit the diffuser grid.
What information do you need for a quotation?
Please provide the tank dimensions and water depth, the oxygen demand or required air flow, and the type of wastewater. If you are replacing existing diffusers, the current make and model and the pipework material help us to offer a matching drop-in solution. Send us your requirements and we will prepare a proposal within 48 hours.
