Peristaltic pump improves fluoride injection accuracyProblem
Pulsating-type diaphragm metering pumps were injecting fluoride at the Jones Ferry Road Water Treatment Plant in North Carolina. The fluoride treatment system at the 20 mgd plant requires one primary pump and one backup pump controlled by 4-20 mA and monitored by a SCADA system. The injection rate is 63 ml/min. Operations supervisor Dusty Martin, with the Orange Water and Sewer Authority, had trouble maintaining accurate and consistent fluoride residuals using the diaphragm pumps, which also were affected intermittently by air pockets that entered the system through the day tank.
Solution
Martin installed a Flex-Pro peristaltic pump
