Application

In order for biological water treatment systems to work properly, enough oxygen has to be introduced to allow the microorganisms to develop. Furthermore, effluent has to be mixed with bio-sludge that is held in suspension.

TMI surface aerators simultaneously perform these 3 functions of introducing oxygen, mixing effluent / sludge and maintaining in suspension. They are therefore particularly intended for the treatment of biodegradable wastewater originating from industries or urban communities.

Aérator AVL1

Our AVL 1 aerators consist of a drive unit and a low-rpm, surface-level turbine. The thin-blade, hub-welded turbines are designed to ensure a high oxygen transfer rate and to effectively keep the sludge in suspension.

These low-speed aerators are available in 1.1 kW to 4 kW versions. The turbines are available in 600 to 1050 mm diameter, 3- to 5-blade versions.

Aérator AVL2

Our AVL 2 aerators consist of a drive unit and a low-rpm, surface-level turbine. The thin-blade, hub-welded turbines are designed to ensure a high oxygen transfer rate and to effectively keep the sludge in suspension.

These low-speed aerators are available in 5.5 kW to 75 kW versions. The turbines are available in 1,220 to 2,800 mm diameter, 3- to 18-blade versions.

Floating aerator

Floating aerators from TMI are primarily used on lagoons where civil engineering works would be very costly or unfeasible. These fl oating aerators share the same design characteristics as fi xed aerators, in which a gear motor with a high AGMA rating drives a surface turbine at low rpm. The only diff erence is in the installation: these aerators sit atop a floating frame mounted on three fl oats to prevent any risk of leaks. They are attached to threaded rods to enable fine adjustments.

High-speed aerator

High-speed aerators diff er from low-speed versions in that they are mainly used for processes in which the oxygen transfer rate is not a crucial factor (under 1.1 kg of O2/kW/h). They consist of a high-rpm turbine inside a pipe. The pumpimpeller assembly is mounted on a polyester fl oat. The motor used is determined by the power supply characteristics.

Noise control cover / spray cover

A noise control cover mounted around the motor unit significantly reduces the audible noise level. Its open-top design ensures that the motor unit remains properly vented, removing the need for a fan. The surface aerator sprays are hooded for two main reasons:
– As an abatement measure to reduce noise emissions from the downward water fl ow,
– As a containment dome against aerosols discharged by the effluent spray into the atmosphere,

Optional mounting frame

The optional mounting frame off ers a signifi cant benefi t when installing and servicing an aerator. With a mounting frame, the aerator can be fi tted and removed in one piece and in one operation, without having to be disassembled. On a normal aerator, the relatively large moving mixing section requires the turbine to be disassembled and the gear motor and mounting parts to be individually removed, followed by the moving section from underneath. Our frame is wider than the diameter of the aerator, which allows the entire unit to be lifted by the four corner-mounted lifting lugs.

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