Mechanical Aerators

A: The use of machinery to mix air and water so that oxygen can be absorbed into the water. Some examples are paddle wheels, mixers, or rotating brushes to agitate the surface of an aeration tank; pumps to create fountains; and pumps to discharge water down a series of steps forming falls or cascades.

A: Mechanical aeration and diffused aeration are the two primary types of aeration systems. Mechanical aeration takes place at the top of a tank or lagoon, whereas diffused aeration occurs at the bottom.

A: The main distinction lies in their application methods. Core aeration physically removes plugs of soil to alleviate compaction, while liquid aeration involves spraying a solution that aims to loosen soil without mechanical extraction.

A: The equipment used depends on which configuration was utilized for the treatment process. There are four general configurations for mechanical aeration systems: radial flow low speed, axial flow high speed, horizontal rotors, and aspirating devices.

A: The following are three common types of mechanical aeration systems: Horizontal aspirators: These systems contain propellers that turn more or less horizontally. They push air down the vertical shaft and into the tank. Vertical aerators: These systems contain propellers that turn vertically to drive water into the air.

A: Diffusers are fixed in place and are not portable. Mechanical aerators have a motor attached to the aerator, so maintenance and repair must be performed outdoors.