High velocity aerojets are used for the securing of oxygen, needed for the support of the vital functions of the microorganisms in the biological treatment systems. These equipments insure the transfer of oxygen through aspiration of air from the atmosphere and producing of fine bubbles under the water surface with the assistance of a spiral propeller.

The high speed aerojets consist of an electric motor above the surface of the water, a chassis, submerged in the water at a slope of 35-40º, made of stainless steel and spiral propellers providing for the dispersion of the air.

Depending on the used technology, aerojets can be installed static or on pontoons. The depth for submerging can be controlled, which assures better mixing (dispersion) of the air in the aeration tanks. The high velocity aerojets have a very quiet regime of work and are mounted and dismantled very easily. Their working mode is automatic, so upon reaching the necessary quantity of oxygen in the tank they turn off. The used electric motors are from SIEMENS.