Water treatment method

Details Water treatment method Water treatment method

2005-03-08

2005-03-08

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C044S621000, C044S624000, C210S713000, C210S716000, C210S718000, C210S721000, C210S724000, C210S726000, C210S912000, C423S636000

Reexamination Certificate

active

06863819

ABSTRACT:
The invention provides a method treating acid raw water including the step of neutralising the water by adding calcium carbonate to it in a neutralising stage. The neutralised water is then rendered alkaline or more alkaline by adding an alkali thereto selected from calcium hydroxide, calcium oxide and mixtures thereof in a lime treatment stage. The alkaline water is then treated with carbon dioxide in a carbon dioxide treatment stage, with the carbon dioxide reacting in the carbon dioxide treatment stage with calcium hydroxide dissolved in the water.

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patent: 0072885 (1983-03-01), None
patent: 01075093 (1989-03-01), None
patent: WO 9901383 (1998-06-01), None
patent: 984724 (1998-06-01), None

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