Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1978-07-10
1980-04-15
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 32, 210 37R, 210 64, 210501, B01D 1504
Patent
active
041982967
ABSTRACT:
This invention relates to the discovery that chemicals existing in natural waters, which have been pretreated in municipal water treatment facilities, as well as natural surface and underground waters which have not been so pretreated, do inhibit the biocidal effect of known water disinfectants of the metallic ion type. This may be overcome by exchanging for the halide ions in such water an anion, such as bicarbonates, which does not inhibit the biocidal effect of metallic ions, nor does it react chemically with known oxidizing biocides to form halogenated organics which are suspected of causing cancer. Further, water treated in accordance with this invention substantially maintains its original ionic character to maintain the water in a natural state, for example, not deionized.
In accordance with another aspect of the invention, water which has been municipally treated with oxidizing biocides and may contain halogenated organics is pretreated to remove the halogenated organics prior to the removal of halides referred to above.
REFERENCES:
patent: 2391258 (1945-12-01), Meincke
patent: 2445669 (1948-07-01), Goetz
patent: 2595290 (1952-05-01), Quinn
patent: 3359743 (1967-09-01), Bealle
patent: 3585130 (1971-06-01), Gregory
patent: 3872013 (1975-03-01), Nishino et al.
"Potable Water Bactericide Agent Devel," Final Report, 6-12, (1971), Contract NAS 9-12104.
Doumas John J.
Molof Alan H.
Raymond Gordon H.
Wikstrom Lee
Consolidated Foods Corporation
Cross E. Rollins
Hart Charles N.
Henry William S.
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