Method of improving city water

Details Method of improving city water Method of improving city water

1992-09-08

1995-02-21

Wyse, Thomas

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

210717, 210743, 210749, C02F 502

Patent

active

053913027

ABSTRACT:
The Langelier index and pH of city drinking water are improved by mixing and reacting a slurry of calcium carbonate and slaked lime covered with calcium carbonate produced in a slaked lime dissolving vessel with carbonic acid-containing water in a mixing and reacting vessel to make a calcium hydrogen carbonate aqueous solution which in turn is continuously added to water in a water-receiving vessel together with the aqueous solution of slaked lime. As a result, unused undissolved matter is decreased, and the Langelier index of drinking water can be improved.

REFERENCES:
patent: 1683521 (1928-09-01), Bourgognion et al.
patent: 4366142 (1982-12-01), Kojima et al.
patent: 4389376 (1983-06-01), Kojima et al.

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