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Submersible Pumps as Wastewater Treatment

A treatment plant for treating trade waste water from a dry dock needed a couple of pumps to feed a constant flow to the plant for optimum treatment results. The pumping application was demanding as the pumps needed to lift up 2m from a sump and pump water that contained oil, paint flakes and rust as well as other general debris found in a dry dock. Submersible pumps – the generally accepted pump for these types of applications – were ruled out as the high shear action of the impellers emulsified the oil and a centrifugal pump would give variable flows.