What Is an Aerator Pump?
An aerator pump is a device designed to introduce air into a liquid. Its primary application is in the aeration process of sewage treatment, where aerobic microorganisms are employed. The purpose is not just to transport air but to enhance its dissolution into the liquid by compressing it further. Many products mix the air with water before releasing it as microbubbles, facilitating the efficient dissolution of oxygen as the bubbles rise gently through the liquid.
Uses of Aerator Pumps
Aerator pumps find essential usage in sewage treatment facilities, industrial waste treatment plants, and various sewage treatment processes. They serve as integral components within aeration tanks responsible for treating sewage and other substances using aerobic microorganisms. Their primary function is to supply oxygen to the aeration tank.
When selecting aerator pumps, several factors must be considered, including discharge volume, discharge pressure, mixing range, water depth to be handled, power consumption, and size. Many products incorporate motor parts designed for underwater use, potentially requiring fewer noise mitigation measures.
Principle of Aerator Pumps
This section outlines the fundamental operation principle of aerator pumps. An aerator pump typically consists of an air inlet, compression section, mixing section, and outlet. With the exception of the suction inlet, all these components are often submerged underwater. The compression section utilizes an impeller, blower, or compressor, commonly powered by a 3-phase power supply. In the mixing section, measures are in place to prevent sewage-related clogging through the use of highly sealed and secure structures.
During operation, air is drawn in through the inlet by a high-speed rotating impeller or similar device within the compression section. At this point, the air pressure is increased beyond the water pressure. The depth of the water, the impeller’s speed, and its design all impact the air compression process. The compressed air is then finely dispersed into minute bubbles within the mixing section using a diffuser plate. Subsequently, the aerated air is expelled through the outlet. The outlet is often tapered, allowing the pump to distribute air over a wider area while maintaining a single directional flow.