The Goleta Water District, located south of Santa Barbara in California, serves a population of around 75,000 people across 29,000 acres. The district relies on a vast network of 230 miles of pipelines to distribute water and also manages wastewater treatment at its main facility, the Corona del Mar Water Purification Plant (WTP). Recently, the plant installed 12 Pulsafeeder Pulsar Hypo pumps to accurately dose sodium hypochlorite into the wastewater treatment process, ensuring effective disinfection.
The Corona del Mar WTP has a maximum capacity of 36 million gallons per day (mgd), and the Pulsafeeder pumps are used to add precise amounts of sodium hypochlorite. Most of the 12 units are dedicated to disinfecting influent water at a rate of 55 gallons per hour (gph), while others are used in clean and booster stations, delivering 32 gph to the clean well and 9 gph at the booster station. All pumps operate under 100 psi, and since their installation last year, there have been no reports of downtime or failure.
One of the first pumps installed was an upgraded version of a standard Pulsafeeder Pulsar pump. Mike Alvarado, the site’s chief technician, had several existing components and worked with Charles P. Crowley, a local dealer, to retrofit them. This approach saved time and resources, as only minor engineering adjustments were needed. A total of six pumps were retrofitted, and six new units were added to meet the growing demand.
Previously, the district used peristaltic tube pumps for dosing, but frequent tubing replacements led to inefficiencies. Diaphragm pumps were considered, but gas accumulation issues made them unsuitable. The Pulsafeeder Pulsar Hypo pump solves this by allowing compressed gas to be flushed out through the discharge system, preventing performance issues and eliminating the need for bypass systems. Its sealed-loop design also prevents crystallization of sodium hypochlorite, making it ideal for long-term use.
Mike and his team now enjoy reliable operation without unexpected maintenance calls. Plans are underway to expand the use of these pumps across the district.
In another project, Thames Water in England installed two Watson-Marlow Bredel 520 series peristaltic pumps at the South East Wastewater Treatment Plant in Cranleigh. These pumps handle the precise dosing of ferric chloride, a corrosive chemical used to meet strict BOD regulations. The 520 series features a brushless DC motor, IP66 rating, and high accuracy, with flow rates ranging from 4 µl/min to 3.5 l/min. They allow for ±0.1% accuracy and can be calibrated by weight or volume. After six months of operation, no faults have been reported.
Meanwhile, in Spain and the Netherlands, ABS Pumps supplied equipment for new wastewater treatment plants. In Gijón, the La Reguerona WWTP uses vertical submersible propeller pumps and AFP submersible pumps to handle large volumes of wastewater. In Lichtenvoorde, the Industriewater Lichtenvoorde CV plant supports a tannery that processes over 200,000 leathers annually. The plant uses similar equipment, including pumps, mixers, and aeration systems, to manage increasing production demands.
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