Water treatment

Details Water treatment Water treatment

1979-10-02

1981-03-03

Therkorn, Ernest G.

Liquid purification or separation

Processes

Chemical treatment

210764, 424130, C02F 172, C02F 150

Patent

active

042539714

ABSTRACT:
A method of controlling pathogenic organisms, fungi and algae in water which includes the steps of applying to the water a primary reagent comprising a linear polymeric biguanide or a salt thereof which in its free base form has a recurring polymer unit represented by the formula ##STR1## wherein X and Y represent bridging groups in which together the total number of carbon atoms directly interposed between the pairs of nitrogen atoms linked by X and Y is more than 9 and less than 17, and a back-up algicidal agent comprising a substance which in the aqueous phase produces hydrogen peroxide, preferably persalts selected from perborates, percarbonates, peroxides and persulphates.

REFERENCES:
patent: 1105739 (1914-08-01), Wunsche
patent: 1271611 (1918-07-01), Pickl
patent: 3130124 (1964-04-01), Ferris
patent: 3215627 (1965-11-01), Tools
patent: 3248281 (1966-08-01), Goodenough
patent: 3342674 (1967-09-01), Kowalski
patent: 3684477 (1972-08-01), Blumbergs
patent: 3690860 (1972-09-01), Salutsky
patent: 3715309 (1973-02-01), Zumbrum
patent: 3772193 (1973-11-01), Nelli
patent: 4014676 (1977-03-01), Carter

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