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Method of disinfecting water
| Details |
Inventors: Eibl, Volker; Reis, August;
Assignee: Sachs-Systemtechnik GmbH (Schweinfurt am Main, DT)
Primary Examiner: Mack; John H.
Assistant Examiner: Prescott; A. C.
Attorney, Agent or Firm: Berman; Hans
Anodic disinfection of drinking water by electric current is enhanced when the electrolytic cell is divided into anode and cathode compartments by a membrane permeable to anions, the water to be disinfected is pumped through the anode compartment, and the electrolyte in the cathode compartment is enriched with chlorides, hydroxides, carbonates, or peroxides of the alkali metals, with hydrogen chloride, or with hydrogen peroxide. |
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DETAILED DESCRIPTION What is claimed is: 1.
A method of disinfecting water which comprises: a.
supplying the water to be disinfected to the anode compartment of an electrolytic cell, the cell being divided into said anode compartment and a cathode compartment by a membrane permeable to anions and having an anode and a cathode in said compartments respectively; b.
maintaining in said cathode compartment an aqueous solution of a member of the group consisting of the chloride, hydroxide, carbonate, and peroxide of an alkali metal, hydrogen chloride, and hydrogen peroxide; c.
passing direct current between said anode and said cathode through said cell; and d.
withdrawing disinfected water from said anode compartment, 1.
the concentration of said member in said aqueous solution being greater than the concentration thereof in the water in said anode compartment and sufficient to enhance the disinfecting effect of said current on said water in the anode compartment as compared to the disinfecting effect of said current on said water in the anode compartment when said cathode compartment is filled with said water.
2.
A method as set forth in claim 1, wherein said alkali metal is sodium or potassium.
3.
A method as set forth in claim 1, wherein said member is sodium chloride, hydrogen chloride, or hydrogen peroxide.
4.
A method as set forth in claim 1, wherein a potential difference of at least 1.
5 volts is applied to said anode and to said cathode for causing said passing of said direct current.
5.
A method as set forth in claim 1, wherein said water to be disinfected contains pathogenic germs when supplied to said anode compartment, and is held in said anode compartment for a period sufficient to kill said germs.
6.
A method as set forth in claim 5, wherein said period is 7 seconds to 150 seconds, preferably 7 to 60 seconds.
7.
A method as set forth in claim 1, wherein said member is sodium chloride, and said concentration thereof is between 0.
05 and 0.
5% by weight.
8.
A method as set forth in claim 1, wherein said member is hydrogen chloride, and said concentration thereof is between 0
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