What is an Aeration System?
Aeration devices force air, oxygen-filled air into the liquid being pumped and/or treated thus increases Oxygen levels in the fluid which in turn increases biological growth.
The increased biological growth assists in breaking down organic compounds, minimising odours and corrosion, and increasing the quality of the primary water/effluent.
Aeration of fluid can be achieved in a multitude of ways which include:
- Paddle-type systems. These paddles simply rotate and create splashing at the water surface.
- Fountains-type systems. These systems simply spray water into the air and back down into the body of water. This creates splashing which pushes bubbles into the fluid. This can be achieved by most submersible pumps or even end-suction pumps.
- Blowers can be used to inject air into the fluid (Such as Tsurumi RS Series, Becker VT Series Rotary Vane & SV Series Side Chanel Blowers). These blowers normally pump the air through a submerged aeration tube or diffusers and the bubbles then trickle up to the surface releasing oxygen into the water as they ascend.
- Submersible Aerators, such as the Tsurumi TRN and BER series pumps are a great option for wastewater treatment. These pumps are submerged in the fluid. They draw the fluid into the pump and discharge it through a venturi directly back into the same body of fluid. The air is drawn into the venturi via an air pipe that extends from the pump up into the atmosphere, and the air and water mixture is pumped out into the body of fluid. The bubbles then trickle up to the surface releasing oxygen into the water as they ascend.
- Centrifugal Pumps such as Gorman Rupp T series, coupled with the Gorman Rupp EchoStorm. We use an end suction pump to move the water and pump the water through a venturi which is where the air is drawn into the system. This air-filled fluid is then discharged back into the body of water. As with the submersible options, the oxygen is being dispersed into the fluid from the time it enters the venturi right until the bubbles reach the fluid surface.
Where are Aeration Systems Used?
Aeration Systems are commonly used in:
- Wastewater treatments in the municipal, industrial or agricultural sectors. They allow organic compounds in wastewater to be consumed by the increased biological matter in the fluid thus breaking it down quickly. This greatly improves the operation of primary clarifiers in wastewater treatment plants and increases the quality of the primary effluent.
- They are also used in applications where fish, crustaceans, and plants are being cultivated. The increased oxygen level increases growth and reproduction.