Glossary Terms

May 3, 2017

P.E.

portable exchange.
May 3, 2017

pathogens

Microorganisms that can cause disease in other organisms or in humans, animals, and plants. They may be bacteria, viruses, or parasites and are found in sewage, […]
May 3, 2017

parts per million (ppm)

A measure of proportion by weight which is equivalent to one unit of weight of solute (dissolved substance) per million weights of solution. Since one liter […]
May 3, 2017

parts per billion (ppb)

A measure of proportion by weight which is equivalent to one unit weight of solute (dissolved substance) per billion unit weights of the solution. This measurement […]
May 3, 2017

particle size

As used in water industry standards, this term refers to the size, expressed in microns, of a particle suspended in water as determined by the smallest […]
May 3, 2017

packed bed

A bed of filter or ion exchange medium which is completely retained so that no bed expansion can occur and no backwash step is used to […]
May 3, 2017

P alkalinity

Phenolphthalein alkalinity of water as determined by titration with standard acid solution to the phenolphthalein endpoint (pH approx. 8.3). Includes carbonate and hydroxide alkalinity. (See total […]
May 3, 2017

ozone

An unstable form of oxygen (O3), which can be generated by an electrical discharge through air or regular oxygen. It is a strong oxidizing agent and […]
May 3, 2017

oxidizing agent

A chemical substance that gains electrons (i.e. – is reduced) and brings about the oxidation of other substances in chemical oxidation and reduction (redox) reactions.