Glossary of Water and Wastewater Terms

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5 random terms from our glossary

n factor

A coefficient value representing the pipe or channel roughness in Manning's formula for computing flows in gravity sewers. Also see friction loss and Manning’s formula.

palatable (PAL-uh-tuh-bull)

Water at a desirable temperature that is free from objectionable tastes, odors, colors, and turbidity. Pleasing to the senses.

alternating current (AC)

An electric current that reverses its direction (positive/negative values) at regular intervals.

mixed liquor volatile suspended solids (MLVSS)

The amount (mg/L) of organic or volatile suspended solids in the mixed liquor of an aeration tank. This volatile portion is used as a measure or indication of the microorganisms present.

prestressed

A prestressed pipe has been reinforced with wire strands (which are under tension) to give the pipe an active resistance to loads or pressures on it.