Glossary of Water and Wastewater Terms

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5 random terms from our glossary

membrane bioreactor (MBR)

A wastewater treatment process that uses a suspended growth bioreactor (typically found in activated sludge treatment processes) coupled with a membrane filtration process like microfiltration or ultrafiltration.

integrated facility

Plants that, prior to treatment or discharge, combine the metal finishing wastewaters with significant quantities (more than 10 percent of total volume) of wastewaters not covered by the metal finishing category. Also refers to any facilities covered by any of the industrial pretreatment categories and various combinations of categories. Also called integrated plant.

explosimeter

An instrument used to detect explosive atmospheres. When the lower explosive limit (LEL) of an atmosphere is exceeded, an alarm signal on the instrument is activated. Also called a combustible gas detector.

water lance

A pipe on the end of a water hose that is used to hydraulically jet out solids.

Parshall flume

A device used to measure the flow in an open channel. The flume narrows to a throat of fixed dimensions and then expands again. The rate of flow can be calculated by measuring the difference in head (pressure) before and at the throat of the flume.