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 Z5 random terms from our glossary
dogs
Wedges attached to a slide gate and frame that force the gate to seal tightly.
DPD method
A method of measuring the chlorine residual in water. The residual may be determined by either titrating or comparing a developed color with color standards. DPD stands for N,N-diethyl-p-phenylenediamine.
vitrified clay pipe (VCP)
A type of pipe used in wastewater collection systems. Vitrified clay pipe is rigid and resistant to internal and external attack from acids, alkalies, gases, solvents, and other materials found in wastewater.
electrical logging
A procedure used to search for water-bearing formations (aquifers) by determining the porosity (spaces or voids) of geologic materials. Electrical probes are lowered into wells, an electric current is induced at various depths, and the resistance measured indicates the porosity of the formation.
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.
