Glossary of Water and Wastewater Terms

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

5 random terms from our glossary

peak demand

The maximum momentary load placed on a water treatment plant, pumping station, or distribution system. This demand is usually the maximum average load in one hour or less, but may be specified as the instantaneous load or the load during some other short time period.

routine sampling

Sampling repeated on a regular basis.

carbonaceous stage (car-bun-NAY-shus)

A stage of decomposition that occurs in biological treatment processes when aerobic bacteria, using dissolved oxygen (DO), change carbon compounds to carbon dioxide. Sometimes referred to as first-stage BOD because the microorganisms attack organic or carbon compounds first and nitrogen compounds later. Also see nitrification stage.

bend

A piece of pipe bent or cast into an angular shape.

complexed metal

Metals with a tendency to remain in solution rather than form precipitates and settle out. These metals have reacted with or are tied up with chemical complexing agents such as ammonia or citrates, tartrates, quadrol, and EDTA.