Process for purifying waste water by electrolysis

Details Process for purifying waste water by electrolysis Process for purifying waste water by electrolysis

1975-07-15

1977-03-08

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204152, 210 24, C02B 182, C02C 512

Patent

active

040111512

ABSTRACT:
A process for purifying waste water by electrolysis in two steps is disclosed. In the first step, the electrolysis is effected by dipping an iron anode and a carbon cathode in the waste water having a pH of about 7 to be purified until a pH of 11 is reached. The water is filtered to remove the precipitate which has formed. In the second step, the pH of the filtrate having a pH of 11 is adjusted to about 4 by electrolysis with a carbon anode and an aluminum cathode or by adding thereto an acid and then the electrolysis of the filtrate is effected by dipping therein an iron anode and an aluminum or aluminum base alloy cathode. This process may be illustrated by the following diagram: ##STR1##

REFERENCES:
patent: 1219333 (1917-03-01), Kynaston
patent: 3485729 (1969-12-01), Hertz
patent: 3691041 (1972-09-01), Stralser
patent: 3793174 (1974-02-01), Ichiki et al.
patent: 3809631 (1974-05-01), Ohta

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