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Air Diffuser Disk
SPECIFICATION
SHAPE
DISC TYPE
SIZE
9" & 12"
MOC OF MEMBRANE
EPDM / SILICONE
MAX. PRESSURE ALLOWED
1.5kg/cm2
AIR FLOW RANGE
0-20 m3/hr
Bubble size
0.8 - 1.9 mm
overview
Air Diffuser Disk: Efficient Fine Bubble Aeration for Wastewater Treatment
In sewage treatment plants (STPs) and effluent treatment plants (ETPs), proper aeration is one of the most important steps in ensuring smooth, efficient treatment. If oxygen levels drop, bad smells, incomplete breakdown of waste, and high power consumption can follow. That’s where a reliable air diffuser disk plays a big role.
At Vasu Pharmatech, we specialize in the design and manufacture of high-performance fine bubble disc diffusers, made for Indian wastewater conditions. As experienced diffuser manufacturers, we understand what plants need: durable products, smart airflow design, and simple maintenance.
What is an Air Diffuser Disk?
An air diffuser disk (also known as a disc air diffuser) is a circular membrane device installed at the base of aeration tanks. It releases fine air bubbles (0.5 to 2 mm) that rise slowly, allowing maximum oxygen transfer into the water. Compared to coarse bubble diffusers, disc diffusers are more efficient when clean and properly installed.
Made with EPDM or silicone membranes, our disc type air diffusers offer excellent flexibility and resistance to fouling. They’re ideal for biological treatment zones, especially where oxygen demand is high and energy efficiency is key.
Why Choose a Fine Bubble Air Disc Diffuser?
The biggest problem in many STPs is poor oxygenation, leading to sludge buildup, poor BOD/COD reduction, and foul odors. A fine bubble air disc diffuser solves this by delivering oxygen where it’s needed and keeping solids suspended.
Here’s why you should consider air diffuser disk systems:
1. High Oxygen Transfer Efficiency
Fine bubbles mean more surface area. That means more oxygen gets into the water per cubic meter of air, helping reduce blower size and power usage.
2. Low Energy Costs
Because they deliver oxygen efficiently, disc type air diffusers let you use smaller or fewer blowers. That means lower energy bills over time.
3. Uniform Air Distribution
The circular design of the disc air diffuser allows air to spread evenly, even in wide tanks. This reduces dead zones and boosts treatment performance.
4. Long Service Life
Made with EPDM or silicone, our membranes resist wear and fouling. With proper maintenance, a disc diffuser can last for several years without replacement.
5. Easy to Clean and Replace
If the membrane ever clogs or wears down, it can be replaced quickly—no need to remove the entire diffuser system.
Technical Specifications – Vasu Pharmatech
| Specification | Details |
|---|---|
| Shape | Disc & Tube Type |
| Diameter Size | 80mm to 150mm |
| Membrane Material (MOC) | EPDM / Silicone |
| Max. Pressure Allowed | 1 to 1.5 kg/cm² |
| Air Flow Range | 1–10 m³/hr |
| Max. Operating Temp | Up to 60°C |
Where Air Diffuser Disks Work Best
Our air diffuser disk models are best suited for zones where stable aeration is critical:
Aeration tanks in STPs
Secondary treatment tanks
MBBR and SBR systems
Extended aeration zones
Industrial ETP biological reactors
They are not ideal for high-solids or oil-heavy tanks—coarse bubble diffusers are better suited there.
Air Diffuser Disk vs Other Aeration Types
| Feature | Disc Air Diffuser | Tube Diffuser | Coarse Bubble Diffuser |
| Bubble Size | Fine (0.5–2 mm) | Fine (1–3 mm) | Coarse (4–6 mm) |
| Oxygen Transfer Efficiency | High | High | Medium |
| Clogging Resistance | Medium | High | Very High |
| Best for | Clean biological zones | General aeration | High solids & sludge |
Customization Support for Your Plant
Every treatment system is different. That’s why we provide:
- Help choosing between disc, tube, or coarse bubble diffuser
- Layout design for optimal air distribution
- Blower sizing assistance
- Full training and post-installation support
We’re not just a diffuser manufacturer—we’re your partner in performance.
Common Problems Solved by Air Diffuser Disks
Problem: High power consumption from large blowers
Fix: Use fine bubble disc diffusers for better oxygen efficiency
Problem: Sludge settling or poor mixing
Fix: Install disc diffusers evenly to ensure circulation
Problem: Odor complaints near the STP
Fix: Better oxygen transfer prevents anaerobic zones
Problem: Uneven aeration across tanks
Fix: Disc shape allows better coverage than linear diffusers
Problem: Frequent clogging of membranes
Fix: Use silicone-based diffusers or set up a cleaning schedule.
Installation Tips
- Always clean the tank floor before installation.
- Install with proper spacing to avoid bubble interference.
- Ensure blowers are matched to diffuser air demand.
- Use pressure gauges to monitor membrane performance.
- Schedule cleaning every 6–12 months, based on wastewater type.
Why Vasu Pharmatech?
At Vasu Pharmatech, we bring:
- Real-world project experience in Indian STP and ETP installations
- Fast local manufacturing and delivery
- Transparent pricing and technical guidance
- Full after-sales support and spare part availability
We don’t just sell products—we help you run efficient plants. From fine bubble air disc diffusers to heavy-duty coarse bubble diffusers, we offer the right solution for every zone in your treatment plant.
Advanced Support for Long-Term Efficiency
Vasu Pharmatech’s engineering team goes beyond supply. We help with system design, offer site-specific recommendations, and provide detailed performance tracking plans. Our goal is to optimize every cubic meter of air and water your plant handles.
We also offer membrane replacement services, inspection audits, and diffuser layout redesigns for retrofitting or scaling up older plants. Our Indian-manufactured disc air diffusers meet global quality standards while keeping delivery fast and costs low.
Whether you’re treating municipal sewage or industrial wastewater, trust us to recommend the right diffuser configuration. We match diffuser size, quantity, and blower specs to your actual plant conditions, not just generic formulas.
Conclusion
Choosing the right aeration system affects everything—power use, treatment efficiency, odor control, and long-term cost. The air diffuser disk is an excellent choice for fine bubble aeration in clean wastewater zones. With high oxygen transfer, energy savings, and solid construction, they offer long-term value.
At Vasu Pharmatech, our disc air diffuser systems are designed with the Indian wastewater ecosystem in mind. Whether you’re upgrading your current STP or building a new ETP, we’ll help you choose the right disc type air diffuser that fits your tank size, airflow, and treatment goals.
We offer customization, on-site guidance, and dependable after-sales service—because great aeration isn’t just about hardware, it’s about performance over time.
Don’t guess your way through aeration—partner with an experienced diffuser manufacturer like us. We’ll make sure your fine bubble air disc diffuser delivers the efficiency and reliability your plant deserves.
Let’s get your aeration system working smarter, not harder.
FAQ
An air diffuser disk is a circular membrane device that releases fine air bubbles into wastewater. These bubbles increase oxygen levels, which helps in breaking down organic matter during biological treatment. The fine bubbles rise slowly, improving oxygen transfer efficiency in STP and ETP tanks.
A disc air diffuser creates smaller bubbles than coarse bubble diffusers, making them more efficient for oxygen transfer. Unlike tube diffusers, disc types offer even air distribution across the membrane. They’re ideal for clean biological zones where energy efficiency and fine aeration are critical.
Fine bubble air disc diffusers work best in aeration tanks, secondary treatment zones, SBR, and MBBR systems. They are not recommended for tanks with heavy sludge or oil content, where coarse air bubble diffusers perform better due to their clog-resistant design.
Maintenance depends on the wastewater quality. Typically, disc type air diffusers should be inspected every 6 to 12 months. Regular cleaning helps prevent clogging and maintains high oxygen transfer efficiency. Silicone membranes last longer and resist fouling better than standard EPDM.
Vasu Pharmatech offers locally manufactured, durable air diffuser disks tailored to Indian STP and ETP needs. We support you with layout design, blower sizing, post-installation help, and spare parts. Our fine bubble disc diffusers ensure high efficiency and long service life with transparent pricing.
★★★★★ 5/5
Reviews and Ratings
We certify that M/s. Vasu Pharmatech, located at 66B, Pocket AD Shalimar Bagh, Delhi-110088, supplied us with a Pharmatech filter press for our 275 KLD ETP plant at M/s. Asian Colour Coated Ispat Ltd. in Bawal, Dist: Rewari (Hr.). The plant was started in January 2018 and is still working well. The product and its performance have been satisfactory up to now.
ASIAN COLOUR COATED ISPAT LIMITED
Rewari, Haryana
