DUDS 215 Disc Diffuser System – Advanced Aeration for Biological Wastewater Treatment
Superior Aeration Technology for Global Wastewater Solutions
The rubber diaphragm is disc-shaped and securely installed within its tray. The fine I-shaped pores on the membrane surface are arranged in a spiral circumferential pattern, which not only maintains the diameter of bubbles released by the aerator within a specific range but also relatively reduces the aerator's resistance.
Product Function:
When compressed air passes through, the rubber diaphragm is pressurized, causing the micropores on it to expand and release oxygen into the tank. The bubbles are broken into smaller sizes as they pass through these micropores. The bubble diameter can self-adjust slightly based on the airflow rate, thereby achieving optimal oxygen transfer efficiency. The design of the sealing ring and O-ring around the rubber diaphragm ensures an airtight seal between the diaphragm and the fixed tray. As the airflow rate increases, the sealing capability enhances accordingly, effectively preventing air leakage.
When aeration stops, the resilience of the diaphragm causes the non-perforated thickened area at the center to automatically press against the support tray, creating a self-sealing check valve function. The micropores on the rubber diaphragm also close automatically, preventing wastewater from entering the aerator and pipeline system, thereby avoiding sludge clogging. Additionally, the specialized rubber adapter provides sealing and anti-vibration functions after the threads are tightened, ensuring a secure connection and reliable sealing between the aerator and the air supply pipeline.
Technical Specifications
| Model |
DUDS 215(7'') |
DUDS 270(9") |
DUDS 350(12") |
| Active Surface Aera(m2) |
0.0225 |
0.0375 |
0.065 |
| Size |
7(215mm) |
9(251mm) |
12(330mm) |
| Design Flow(m3/hr) |
0.5-2.5 |
2.5-5.0 |
4.0-8.3 |
| Membrane Thickness(mm) |
2 |
2 |
2 |
| Hole size(mm) |
1or2mm |
1or2mm |
1or2mm |
| Slit Quantity |
3900 |
6600 |
10155 |
| SOTE%(4.5M Water Depth) |
22-40 |
31-59 |
35-59 |
| Drag Loss(pa) |
1285-2124 |
2200-4100 |
2000-4400 |
| Service Life(YEAR) |
≥5 |
≥5 |
≥5 |
(Note: Exact values depend on system configuration. Contact SSI for detailed specs.)
Product Advantages
(1) Silicone Diaphragm: Made from high-quality imported silicone raw materials, customized in composition and formulation to meet specific aeration requirements. It offers exceptional physical and chemical properties, effectively preventing shrinkage, hardening, and aging of the diaphragm, thereby extending the product's lifespan.
(2) Plastic Support Disc: Crafted from ABS engineering plastic with additives such as anti-aging agents. This ensures the product retains sufficient strength while maintaining outstanding toughness. It is resistant to oxidation, UV rays, impact, creep, and corrosion, delivering balanced, stable, and durable performance.
Technology & Craftsmanship
(1) Specialized Diaphragm Surface Treatment: Utilizes advanced perforation technology to ensure a smooth surface and fine pores. This minimizes scaling, produces fine bubbles, and ensures even air distribution, effectively reducing the shear damage of bubbles to activated sludge particles and enhancing the system's biochemical activity.
(2) Extrusion Process for Rubber Diaphragm Production: Guarantees uniform density of the diaphragm, providing multi-directional tear resistance and high tear strength.
(3) Mechanical Assembly Production Line: Ensures ample supply, consistent and reliable product quality, and high repeatability.
Why is the Global Choice?
The working principle of fine bubble disc aerators involves the compressed air system forcing air through the aerator's microporous diffusion disc, generating a large volume of fine bubbles. During their ascent, these bubbles facilitate gas-liquid contact with the water, allowing oxygen to dissolve into the water and thereby increasing the dissolved oxygen concentration in the wastewater. Due to their larger surface area, these fine bubbles enhance the gas-liquid contact area, improving the mass transfer efficiency of oxygen.
FAQs
Q: Why choose 215 for biological treatment?
A: The high SOTE and uniform bubble distribution enhance microbial activity, improving BOD/COD removal in wastewater.
Q: How does PTFE coating improve efficiency?
A: It reduces fouling, membrane hardening, and DWP fluctuations, ensuring stable performance over time.
Q: Is remote monitoring available?
A: Yes! SSI Telemetry provides real-time data on airflow, DWP, and system health, reducing downtime.
Q: Can assist with system design?
A: Absolutely! SSI offers full engineering support, including 3D modeling and hydraulic simulations.
Q: What markets does serve?
A: SSI systems are widely used in Saudi Arabia, Malaysia, Indonesia, Brazil, and other regions with stringent wastewater regulations.
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