Aerator Diffusers

Aerator Diffusers

Fine bubble diffusers (also known as microbubble or membrane diffusers) are devices used to introduce air or oxygen into water in the form of very small bubbles, typically less than 2 mm in diameter. These diffusers are designed to maximize oxygen transfer efficiency (OTE) by increasing the surface area of contact between air and water.

How They Work

Fine bubble diffusers release air through perforated membranes (typically EPDM, PTFE-coated EPDM, or silicone). When pressurized air passes through the membrane holes, it forms hundreds of thousands of tiny bubbles. Because fine bubbles rise slowly, they remain in contact with the water longer—improving oxygen dissolution and energy efficiency.

Key Components

• Membrane Disc, Tube, or Panel: Made from EPDM, silicone, or PTFE for chemical resistance and flexibility.
• Support Base: Usually ABS or PVC, it holds the membrane in place.
• Check Valve: Prevents backflow of water when the system is off.
• Connection Port: Fits air distribution piping (¾”, 1″, or customized).

Applications

• Municipal and industrial wastewater treatment
• SBR (Sequencing Batch Reactors) systems
• MBBR (Moving Bed Biofilm Reactor) aeration
• Aquaculture tanks and fish farms
• Sludge stabilization or digesters
• Equalization and nitrification basins