The importance of achieving ever smaller bubble sizes has been a hotly debated subject in the industry as ultra-fine bubbles (micrometer size) are generally perceived to rise too slowly and provide too little “pump age” to provide adequate mixing of sewage in an aeration tank. On the other hand, the industry standard “fine bubble” with a typical discharge diameter of 2 mm is probably larger than it needs to be for many plants. Average bubble diameters of 0.9 mm are possible nowadays, using special polyurethane (PUR) or special recently developed EPDM membranes.

The larger air release openings of a coarse bubble diffuser help to facilitate a higher oxygen transfer rate and bacterial growth. One disadvantage of using fine bubble diffusers in activated sludge tanks is the tendency of floc (particle) clogging the small air release holes.


• Water Sparks® Diffusers High-Quality EPDM silicone tube diffusers.
•  Different membrane sleeves materials available.
• High resistance against the biochemical substances of waste water.
• PP/PVC-diffuser-bodies, 63 mm diameter, 90mm diameter, Membrane sleeves   inserted in tube each both side AISI 304 Clamps.
• Standard length 610 mm, 750 mm and 1000 mm (another length on request).
• Custom designed PP diffuser tubes are possible.
• High oxygen transfer due to fine bubble aeration.
• Energy saving due to intermittent aeration and high oxygen input.
• Low maintenance due to perfect design and long lifetime.
• Long lifetime due to high-quality materials.
• Replacement tube membranes and spare parts for self-installation at many lengths and diameters.


• Municipal waste water treatment plants
• Industrial waste water treatment plants
• Iron Separation in Iron water
• Drinking water aeration

Iron in Water Removed by Air Diffuser Method