Principle of air supply low-pressure jet aerator: the air supply jet aerator generally injects air into the equipment through the blower. For this type of jet aerator, the existence of the throat tube and diffusion tube will increase the resistance and reduce the flow rate of the gas and liquid at the outlet. Pressurized working medium (generally, the mixture of water and activated sludge) and compressed air through the jet device, because of the gas liquid two phase energy difference, the beam of the boundary layer and the surrounding liquid energy exchange, the original beam of boundary layer due to the loss of part of the energy to reduce the flow velocity, and beam of boundary layer in a certain speed gradient, formed the strong shear stress, and turbulent diffusion effect. With the transfer of energy, strong turbulence continuously diffuses to the liquid around the core area and boundary layer, and finally the fluid at the boundary of jet flow mixes with the liquid in the core area. In addition, strong shear force exists between the boundary layer of the jet flow and the surrounding aeration tank, resulting in vortex turbulence. The entry of gas-liquid mixtures into the aeration tank by the jet device is equivalent to another jet flow, and the activated sludge in the air contact surface is renewed again, which makes full use of the jet capacity. The air - liquid mixing of the jet is near the impingement.

Installation: submerged horizontal installation. When installing, the outlet position of the gas-liquid mixture (the distance from the outlet of the mixing pipe to the bottom of the pool) and the distance from the bottom of the pool should be as small as possible, and should not exceed 0.5m. Otherwise, the aeration effect of the entire aeration pool will be affected. In the horizontal direction of the jet, the jet impels the slurry mixture in the tank so that it can replace the thrusters in the oxidation ditch while aerating.