The FRINGS IMMERSIBLE AERATOR TRG is an innovative aeration system for biological wastewater treatment, which works exclusively with pressurized air and is, therefore, particularly well suited for deep basins and high oxygenation quantities. The unit consists of an aerator - which was developed from our tried-and-tested immersible TA aerator - and an immesible gear motor directly connected with this. The immersible aerator is operated standing on the bottom of the reservoir or container.

Operating mode:

The impeller rotates in the centre of the stator. As the self-aspiration effect is relatively low, the air is fed through a pipe in a compressed state (blower or compressor). At the same time, water flows into the impeller, is mixed intensively with the air and the mixture is centrifuged outwardly and radially through the stator. By rotating the impeller and using the stator, the air is divided into fine bubbles. The large substance exchange surface created in this way and the strong turbulence of the created flow enable high oxygenation and oxygen output levels.

The fine bubbly air is then discharged into the liquid being aerated using the extended channels, which are cut into the upper surface. The air-water mixture arising is centrifuged with a high speed densely via the basin or tank floor and permits the direct intensive aeration of the basins or tanks - depending on the aerator type - up to 11m diameter (basin ∅ A). If possible, the basin diameter A should be used as a basis during planning. This should be possible in many cases because the aeration system permits large water depths and, consequently, great reactor volumes. However, large-scale basins or tanks can also be used because a zone exists around the diameter range A which is aerated through the mammoth pump effect of the rising air bubbles (basin ∅ B). The diameter B is selected in such a way that the flow speeds exist to prevent deposits.

Technical data (standard design):

Motor capacities 11 - 90 kW
Oxygenation capacities 70 - 600 kg/h (basin ∅ A)

Aerator components made of stainless steel 1.4301 (304), bushing fabric-base plastics, channels can be folded up (option). Cast iron gear-motor protected by high-quality paint, motorshaft made of stainless steel, gear wheels made of hardened steel with hardened flanks, double mechanical seal made of silicon carbide (medium side), electronis leakage control system, overheating protection and 15m electric cable.

Special designs in higher-quality material are possible.