A submersible aerator combines mixing and aeration in one unit installed below the water surface, drawing in air and dispersing fine bubbles through the liquid. It is used for aerobic biological treatment, equalization and lagoon aeration in municipal and industrial wastewater.
How a submersible aerator works
- Air intake – A self-aspirating design draws air from above the water surface.
- Mixing – The impeller mixes the incoming air with the surrounding liquid.
- Diffusion – Fine bubbles are dispersed into the basin, transferring oxygen to the biomass.
- Circulation – The unit creates upward and lateral flow, keeping solids in suspension.
Typical applications
- Aerobic biological treatment basins;
- Equalization and balancing tanks;
- Sewage lagoons and oxidation ponds;
- Industrial wastewater aeration;
- Retrofitting existing tanks without separate blower and pipework.
Frequently asked questions
What is a submersible aerator?
A submersible aerator is an underwater unit that mixes and aerates wastewater by drawing in air and dispersing fine bubbles, providing oxygen and mixing in one device.
How does a submersible aerator work?
The unit aspirates air from the surface, mixes it with liquid via an impeller, and disperses fine bubbles that transfer oxygen to the biomass while the flow keeps solids in suspension.
Where is a submersible aerator used?
It is used in aerobic treatment basins, equalization tanks, sewage lagoons and industrial wastewater aeration, especially where a compact retrofit is needed.
What is the oxygen transfer of a submersible aerator?
Oxygen transfer depends on unit power, submergence depth and basin geometry; sizing is based on the oxygen demand of the process.
Can a submersible aerator be used in a lagoon?
Yes. Submersible aerators are commonly used in sewage lagoons and oxidation ponds to maintain aerobic conditions and mixing.
How much does a submersible aerator cost?
Cost depends on power, material, control and installation. Send your basin volume and oxygen demand for a preliminary budget estimate.
Do you supply submersible aerators?
Yes. PollutionCtrl supplies submersible aerators for wastewater treatment, with installation and control packages.
Request a project evaluation
Send your basin volume, oxygen demand, depth and operating schedule for a submersible aerator recommendation.
Related Wastewater Treatment Equipment
This equipment is part of a complete wastewater treatment process. For system selection, product comparison and quotation requirements, see our industrial wastewater treatment equipment and waste water treatment systems page.
Submersible Aerator Selection
A submersible aerator for wastewater treatment should be selected from tank volume, oxygen demand, water depth, solids content, mixing requirement, operating schedule and maintenance access. Aeration performance depends on the actual tank and process conditions.
Industrial Wastewater Aeration
Submersible aerators may be used for equalization, biological treatment or supplemental mixing. Compare them with wastewater aeration blowers and other aeration systems based on oxygen transfer, energy use, fouling risk, installation and service requirements.
For a quotation, provide tank dimensions, flow, water quality, oxygen demand, solids, power supply, operating hours and local discharge target. See industrial wastewater treatment equipment.