Glossary of Water and Wastewater Terms

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5 random terms from our glossary

countercurrent rinsing

A rinsing procedure in which rinse water flows from tank to tank in a direction that is opposite to movement of parts being rinsed from tank to tank.

precious metal

Metal that is very valuable, such as gold or silver.

commercial contribution

Liquid and liquid-carried wastes dumped by commercial establishments into the wastewater collection system. Used in this context, commercial contributions are distinct from domestic and industrial sources of wastewater contributions. Examples of high-yield commercial sources are laundries, restaurants, and hotels.

chelating agent (KEY-LAY-ting)

A chemical used to prevent the precipitation of metals (such as copper).

backwashing

The process of reversing the flow of water back through the filter media to remove the entrapped solids.