Water and Wastewater Terms Beginning C

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cross-flow filtration

A type of membrane filtration where the water being filtered flows across the surface of the membrane parallel to the membrane modules.This keeps particle buildup and fouling to a minimum. The flow that is not filtered (retentate) becomes concentrated and flows out the end of the membrane fiber as a wastestream that is returned to the reactor. Systems using cross-flow filtration have a constant flow of retentate recycled back to the reactor. Also see dead-end filtration.