EFFLUENT
It’s all about the pump A PondBoom is recommended for floating centrifugal pump setups so that the pump can be safely brought to shore for maintenance without the need to enter the pond.
By Michael Prestidge Nevada effluent management specialist
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our choice of effluent pump can make or break the functioning of your effluent system. With a lot of pumps to choose from, and manufacturing improvements, we’re often called for advice on which pump is going to be best to get the job done. So, here’s what we recommend. When electric is best Electric pumps are our first recommendation if your pump is just servicing the one effluent pond/ tank, and you’re able to get electricity running down to the storage area. We recommend electric pumps because they are easy to automate and have much lower running costs than diesel and PTO pumps. They also provide a good flow in the range of 18,000 to 36,000 litres per hour, ideal for in-ground systems with most effluent irrigators. The two most common types of
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electric effluent pumps are floating centrifugal and shore-mounted progressive cavity (PC) pumps. Where centrifugal pumps were once the go-to option, recent improvements to the geometry and quality of PC pumps has made them the preferred choice for safety, reliability and consistency. A good quality progressive cavity effluent pump will provide a consistent flow of effluent to the irrigator regardless of where it is situated on the farm. Dairy farmers who’ve installed PC pumps confirm the output is the same whether they are pumping short or long distance, over flat or elevated land. PC pumps have a low horsepower requirement making them more efficient to run. They are also less expensive to install and are self-priming when set up correctly. Being shore-mounted they are the best choice for safety and maintenance as there is no need to enter the pond. Centrifugal pumps are still a good
option, however, compared with a good progressive cavity pump they require a higher power input and more control mechanisms to achieve the same level of consistency. While reliable, as they require more complicated mechanics there is a higher risk of complications. In terms of safety, centrifugal pumps can be shore mounted, but will require some form of priming. Alternatively, a PondBoom™ is recommended for floating centrifugal pump setups, so that the pump can be safely brought to shore for maintenance without the need to enter the pond. PTO and diesel-powered effluent pumps A well-chosen PTO or diesel-powered effluent pump will deliver high volume and high pressure ideal for use with multiple irrigators or drag hose type systems. Since they are portable and don’t require electricity to run, they’re
DAIRY FARMER
March 2021
