How Advanced Feeder Technology Mitigates Disinfection Dangers

Metering pumps have been feeding the treatment chemicals used to disinfect water and wastewater for many decades. However, this traditional liquid dosing technology is brimming with potential problems. From the hazards caused by line breaks or pump failures, to the extensive maintenance and high total costs, metering pumps are often not a solution that allows water system operators to sleep well at night.

Metering pumps rely on positive pressure to push chemicals to the point of application. This requires a cavity to fill and expel chemicals, with a pulsating or “slugged” flow. The chemicals are constantly pressurized and prone to air locking and spills without triggering an alarm. Metering pumps have low turndown rates, so wide feed-rate swings require special arrangements, and they tend to consume a large amount of power.