초록 ▼

A water treatment system and process for removing weakly ionized and/or organic materials from the water by intra-system pH adjustment. An exemplary embodiment of the system includes an inlet through which a feedstream passes into a first chemical treating unit wherein the pH of the feedstream is ma

A water treatment system and process for removing weakly ionized and/or organic materials from the water by intra-system pH adjustment. An exemplary embodiment of the system includes an inlet through which a feedstream passes into a first chemical treating unit wherein the pH of the feedstream is maintained below about 7 to substantially reduce a concentration of weakly basic components in the water by chemical conversion to a more ionized state. A first water treatment unit is positioned downstream of the first chemical treating unit to substantially remove ionized components in the stream, and produce a first product stream. In various embodiments, the first water treatment unit can be selected from the group consisting of a media filter unit, a water softener unit, a dechlorination unit, and combinations thereof. The first product stream is treated downstream of the first water treatment unit in a second chemical treating unit to maintain the pH of the first product stream above about 7 to substantially reduce a concentration of weakly acidic components in the water by chemical conversion to a more ionized state. A second water treatment unit is positioned downstream of the second chemical treating unit to substantially remove the ionized components, and produce a second product stream, which exits the system through a purified water outlet positioned downstream of the second water treatment unit.

대표청구항 ▼

1. A water treatment process comprising the steps of:providing a feedstream comprising chloramines to be purified; maintaining the pH of the feedstream between about 6.0 and about 6.5 to substantially reduce a concentration of ammonia by chemical conversion to ammonium; treating the feedstream in a

1. A water treatment process comprising the steps of:providing a feedstream comprising chloramines to be purified; maintaining the pH of the feedstream between about 6.0 and about 6.5 to substantially reduce a concentration of ammonia by chemical conversion to ammonium; treating the feedstream in a first reverse osmosis unit to substantially remove ammonium and produce a first product stream; treating the first product stream in an electrodeionization unit to produce a second product stream; passing the second product stream from the electrodeionization unit to a second reverse osmosis unit; treating the second product stream in the second reverse osmosis unit to produce a third product stream, wherein the third product steam is free of chloramines; and removing the third product steam from the second reverse osmosis unit.