Bridging the GAPs: Approaches to Treating Water On Farms

A second type of electric pump is a peristaltic pump. With these pumps, a motor drives a rotor assembly that squeezes a flexible tube in the sanitizer solution. As the rotor moves around, it pinches the tube and squeezes an aliquot of solution into the flow of water. These rotary pumps can increase or decrease flow based on the speed of the rotor, the diameter of the tube, and the number of rotors the pump is rotating. Depending on size, rotors can be added to pumps to draw additional solution volume. These peristaltic pumps can also vary in the amount of time the pump is running, to slow or speed up injection. For example, a 50% injection rate could be achieved by turning the pump on for 30 seconds and off for 30 seconds.

Figure 12 - Closeup view of the rotor action of the peristaltic pump. As shown, the tube (yellow) is immersed in the sanitizer solution and as the rotor turns clockwise, it squeezes a small aliquot of sanitizer and pushes it forward into the water flow (Source: Shutterstock)

Figure 13 - Chemical is injected inline using a rotary pump. (Photo Credit: Faith Critzer, Washington State University)


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