METHOD FOR STERILISING WATER AND DEVICE FOR REALISING THE SAME

Title:

METHOD FOR STERILISING WATER AND DEVICE FOR REALISING THE SAME

Document Type and Number:

WIPO Patent Application WO/1998/025855

Kind Code:

A1

Abstract:

The present invention relates to a method for sterilising water as well as to a device for realising the same, wherein influent water is treated by the simultaneous action of atomic oxygen, carbonic acid and hydrated ions of hydrogen peroxide in electrolysers that comprise two chambers with cationic exchange membranes (6, 14). When passing through gas separators (5), the catholyte is depleted of its hydrogen and further discharged from the device through a duct (4). The anolyte, which has acquired a pH of between 3 and 4, is depleted of oxygen O�2? and carbon dioxide CO�2? in gas separators (7) before being fed through a duct (12) for treatment in a second electrolyser. Before entering the anodic chamber, the solution has a pH ranging between 8.5 and 9.0 thanks to the adjunction of a sodium hydrocarbonate solution from a vessel (20). After the electrolysis in the second electrolyser, the catholyte has acquired a pH of between 7.0 and 8.5 in the cathodic chamber (11) and has been depleted of hydrogen in gas separators (13). The catholyte is then discharged from the device through a duct (16) and may be used as a drinkable water that exhibits improved organoleptic and bacteriological quality indices. The device for sterilising water comprises a pair of electrolysers which include cationic exchange membranes and comprise connections from dosing vessels at the anodic chamber inlets. The electrolysers are linked together so that the anodic chamber outlet of the first electrolyser is connected to the anodic and cathodic chamber inlets of the second electrolyser. The anodic chamber outlet of the second electrolyser is in turn connected to the mixing chamber containing the influent water to be treated and fed into the first electrolyser. The cathodic chamber outlets of the first and second electrolysers consist in outlet channels for the solutions obtained from the device, said solutions being drinkable water.

Inventors:

NAIDA NIKOLAI NIKOLAEVICH (RU)
PUSHNYAKOV NIKOLAI KARPOVICH (RU)

Application Number:

PCT/RU1997/000226

Publication Date:

June 18, 1998

Filing Date:

July 18, 1997

Export Citation:

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Assignee:

WESTERN PACIFIC COMPANY INC LT (RU)
NAIDA NIKOLAI NIKOLAEVICH (RU)
PUSHNYAKOV NIKOLAI KARPOVICH (RU)

International Classes:

C02F1/46; C02F1/467; (IPC1-7): C02F1/461; C25B9/00

Foreign References:

SU865829A1	1981-09-23
SU899486A1	1982-01-23
US4391693A	1983-07-05
FR2430988A1	1980-02-08
GB2075061A	1981-11-11
EP0135314A1	1985-03-27

Other References: