Consists of a gear motor coupled directly to an aeration impeller by means of a vertical shaft. The simplicity of this design ensures smooth Oxygen is supplied mainly to the turbulent area on the water surface. In this area, there is a constant renewal of the air-water exchange surface. Additionally, air bubbles are also intro- duced into the liquid in the tank and drawn The gear motor is designed to support the axial and radial forces generated by the water. The aeration impeller has been designed with an adequate profile for good hydraulic efficiency, high oxygen supply and to reduce the possibility...

Calculation basis for surface The agitation should be sufficient to prevent sedimentation at the bottom of the tank. To ensure sufficient agitation, the speed of the liquid at the bottom should not be less than The power necessary to maintain this speed depends on the dimensions and shape of the tank (circular, square, sloping bottom, etc.). For standard tanks, sufficient agitation is achieved with a power-to-weight ratio of 25 W/m3. The oxygen supply of the surface aerator (AS) can be controlled by varying the immersion depth of the impeller and its direction of rotation a) Agitation. By applying...

This is an aeration device with a horizontal shaft (parallel to the water surface). Rotating blades, fixed to the end of a round shaft driven by a gear motor, inject air into the body of water. This process supplies the water with oxygen and also prevents sedimentation thanks to the energy The power required and the amount of oxygen transferred depend on the length of the rotor and the depth atwhich it is operating. A control loop can be installed between the adjustable lock and the rotor (with a frequency adjuster) in order to establish an oxygen uptake rate and to keep it stable over time.