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Distilled deionized water.

Device used to remove dissolved air from solution.

A device used to remove alkalinity from solution by conversion to CO2 prior to air stripping.

Device used to remove dissolved gases from solution, usually by means of an air stripping column.

(DI) The process of removing ions from water, most commonly through an ion exchange process.

Differential temperature.

The process of removing minerals from water, most commonly through an ion exchange process.

The process of removing dissolved salts from water.

See “desalination”.

See “desalination”.

The separation of substances from solution on the basis of molecular size by diffusion through a semipermeable membrane.

The movement of suspended or dissolved particles from a more concentrated to a less concentrated area.

An ion exchange membrane process that separates ionic, nonionic or colloidal species from solution based on differing diffusion rates, using concentration differentials across the membrane as the driving force.

(1) Lowering the concentration of a solution by adding more solvent.

(2) The engineered mixing of discharged water with receiving water to lessen its immediate aesthetic and/or biochemical impact.

(1) The volumetric ratio of solvent to solute. 

(2) The ratio of the water volume in a stream to the waste volume introduced into the stream. The dilution ratio gives an indication of the capacity of a water body to assimilate a waste.

The process of ionization of an electrolyte or salt upon being dissolved in water, forming cations and anions.

(DOC) The fraction of TOC that is dissolved in a water sample.

(DOM) The fraction of organic matter in water that passes through a 0.45 micron filter.

(DO) The oxygen dissolved in a liquid.

Solids in solution that cannot be removed by filtration with a 0.45 micron filter. See “total dissolved solids”.

See “distillation”.

A liquid product condensed from vapour during distillation.

The process of boiling a liquid solution, followed by condensation of the vapour, for the purpose of separating the solute from the solution.

See “dissolved oxygen”.

See “dissolved organic carbon”.

See “dissolved organic matter”.

Water safe for human consumption or which may be used in the preparation of food or beverages, or for cleaning articles used in the preparation of food or beverages.

The air temperature measured by a conventional thermometer.

Colloquial term for a facility designed to produce both electrical power and desalinated water.

A transient membrane formed on the surface of an established membrane by solids filtered from the feed stream.