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
zeta potential
In coagulation and flocculation procedures, the difference in the electrical charge between the dense layer of ions surrounding the particle and the charge of the bulk of the suspended fluid surrounding this particle. The zeta potential is usually measured in millivolts.
Pascal (Pa)
The pressure or stress of 1 newton per square meter.
1 psi = 6,895 Pa = 6.895 kN/m2 = 0.0703 kg/cm2
F/M ratio
See food/microorganism (F/M) ratio.
clinical laboratory
A special medical facility devoted to the identification of diseases and ailments through tests, studies, and culture growths. Services of a clinical laboratory might be necessary in the event of an accidental or intentional release of contagious or infectious wastes into a collection system.
altitude valve
A valve that automatically shuts off the flow into an elevated tank when the water level in the tank reaches a predetermined level. The valve automatically opens when the pressure in the distribution system drops below the pressure in the tank.
