General product information

Aeration is an important step in the process of water and wastewater treatment.
This process of adding air into wastewater allows aerobic biodegradation of the pollutant components. It is an integral part of most biological wastewater treatment systems. Unlike chemical treatment, biological treatment uses microorganisms that occur naturally in wastewater to degrade wastewater contaminants.

When is Aeration used?

• Municipal and industrial wastewater treatment
• Lagoon aeration
• Fish Farm pond aeration
• Lake aeration

Aeration Methods:

Surface aerators:

Surface aerators are available in both floating and fixed execution. Each of these aerators exists in high speed direct drive or low speed with gearbox execution.

Surface aeration, especially the high-speed aerators, have a high efficiency in real activated sludge conditions due to their favourable alpha factor, it is used mostly for the biological process of water purification and plant aeration.

This aeration system extracts water from the basin volume and utilizes air-water contact to transfer oxygen by means of a water spray on the surface. This is the ideal Aeration system for ponds and lakes.

Floating surface aerators:

The AER-AS, is the high-speed direct drive surface aerator that can be used for small tanks to massive lagoons.

Floatable surface aerator generally consists of a top mounted electrical motor, which drives the unique AQUA TURBO® SCREWPELLER®. The electrical motor is mounted on a flange support, which at its turn is mounted on the stainless-steel float. A cone (possibly equipped with cross plates) is mounted below the float and enables an ideal flow into the volute and impeller.

This surface aerator is standard in floating execution but can also be designed as a fixed unit to be installed on a bridge or platform.

LOW-Speed surface aerators

The AER-GD is the low speed surface aerator. In standard execution, this unit is designed for fixed aerator mounting.

Low speed Surface Aerator for wastewater treatment generally consists of a heavy-duty Gearbox, driven by a top mounted Electrical Motor, fastened on a Mounting Plate, and an Impeller.

The low speed aerator can also be designed as a floating unit for installation in large lagoons or basins with fluctuating water level.

Submersible aerators:

Submersible aeration systems are mostly used for basins with a relatively small surface and higher water depth; it brings Air and oxygen on the bottom where it will improve the overall water quality.

As the bubbles rise, they carry the low oxygen water from the bottom towards the surface, where it mixes with the oxygen-rich surface water and atmosphere oxygen before sinking back to the bottom. The continuous vertical mixing helps to increase dissolved oxygen concentration throughout the entire waterbody.

Submersible bottom aerators:

The AER-SB(/L), the high-speed, direct drive submersible bottom aerator that is ideal for deep tanks or tanks with a small surface.

This Submersible Fixed Bottom Aerator consists of a top mounted submersible electrical motor, which directly drives an impeller that is located inside a chamber with one air aspiration opening below, one liquid aspiration opening at the top, and a number of air/liquid diffusion channels.

The submersible AER-GS is a low speed submersible bottom aerator that consists of a heavy-duty submersible gearbox with a top mounted submersible electrical motor. This gearbox is mounted on a support structure that allows the unit to stand on the floor.

The AER-GS can also be designed with long shaft driving the impeller and the Geared motor installed on a bridge or platform.

The AER-SL submersible Aerator is a high-speed direct drive submersible aerator that is generally installed on a guide rail on the side of the basin. The AER-SL creates a directional Flow and.
It consists of a submersible Motor, which drives the unique AQUA TURBO® SCREWPELLER® that is partially located inside a Vacuum Chamber. It is generally mounted on a Sledge, which can slide along a Vertical Guiding Post and be positioned on the desired immersion depth and has an Air Inlet Pipe with a length that fits with the immersion depth of the unit.



Floating Surface Aerator

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AER-AS Floating Surface Aerator

Axial flow aerator with patented instantaneous radial discharge. World renowned for high aeration efficiency in field conditions due to maximum transfer of kinetic energy to water surface. Installations range from small tanks to massive lagoons due to exceptional mixing and oxygen dispersion.
Aerated lagoons
Activated-sludge processes
Aerobic digestion processes
High oxygen transfer + dispersion
Excellent mixing with no floc damage
No gearbox so low maintenance
Simple installation + removal

0.75 - 200kW
4, 6 + 8-Pole Speeds, direct drive
Draught to suit water level
AISI 304/316 or special SS
Pontoon mount
Vertical operation
Surface drive
Fixed or variable WL
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Fixed Surface Aerator
(ES = Extended Shaft)

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AER-F Fixed Surface Aerator

Designed for bridge or platform mounting in basins with fixed or minimal water level variation. Can be installed and removed as a fully assembled unit through a hole in the platform without draining the basin. The length can be manufactured to suit virtually any platform to water level measurement.

Aerated basins + tanks
Activated-sludge processes
Aerobic digestion processes
Oxidation ditches

Easy access
Virtually zero maintenance
Spray openings can align with columns
Installed + removed thru hole in bridge

0.75 - 200kW
4, 6 + 8-Pole Speeds, direct drive
Draught/extended shaft to suit WL
AISI 304/316 or special SS

Fixed bridge/platform mount only
Vertical operation only
1 x Surface drive
Fixed or minimal WL variation


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Fixed or Floating Directional

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AER-SL Fixed or Floating Directional Aerator/Mixer

Aspirator aerator featuring a unique impeller and vacuum chamber design drawing air below water level and dispersing as micro-bubbles in any chosen direction. Ideal when aeration and directional flow generation are required in a single unit. Multiple mounting options allow use in any basin geometry.

Directional aeration + mixing
Storage, equalization, contact + stabilization

1.5 - 30kW
2 + 4-Pole + dual speed, direct drive
EMOD motor - IP 68 protection
AISI 304/316 or special SS

Independent aeration + mixing [dual speed]
Non-clogging impeller + vacuum chamber
Robust + compact design - low vibration
Simple installation + removal

Rail, floor + pontoon mount options
Any operating angle - 0 -180°
1 x Submerged drive
Fixed or variable WL


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