Water and Wastewater Terms Beginning P

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

prechlorination

The addition of chlorine in the collection system serving the wastewater treatment plant or at the headworks of the water treatment plant before other treatment processes. Applied to aid disinfection; control odor and corrosion; reduce plant BOD load; aid in settling; control foaming; and help remove fats, oil, and grease.