Process and apparatus for waste water treatment
OwnerJohn Weseinventor
Life of this patent
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Abstract
The present invention relates to method and apparatus for treating waste water, particularly metal-containing waste water. The process includes separating and removing metals and other impurities from the waste water by the sequential addition of a base, a polyelectrolyte and an acrylamide-containing copolymer dispersion. The purified water is recycled for continuous reuse while the small quantities of metal-rich residue are available for reclamation.
Claims13
A process for treating waste water generated from one or more operations involved in the cleaning/and or repairing of automotive parts, said waste water contaminated with one or more metals comprising:
- (a) agitating said waste water in a treatment tank;
- (b) adding thereto an aluminum-containing base and agitating the mixture;
- (c) adding to the resulting mixture an organic polyelectrolyte and agitating the mixture;
- (d) adding to the resulting mixture a copolymer of sodium acrylate and acrylamide dispersed in mineral oil and agitating the mixture;
- (e) allowing the mixture to settle to form a clean water phase and a sludge phase;
- (f) separating the clean water phase from the mixture;
- and
- (g) treating the remaining sludge phase.
A process of treating a metal-containing waste water generated from one or more operations involved in the cleaning/and or repairing of automotive parts comprising the following steps:
- (a) transferring said metal-containing waste water to a treatment tank and thoroughly agitating;
- (b) adjusting the pH from about 6 to about 11;
- (c) adding an aluminum-containing base to the treatment tank, followed by agitation;
- (d) adding an organic polyelectrolyte to the treatment tank, followed by agitation;
- (e) adding an acrylamide-based copolymer dispersed in mineral oil, to the treatment tank;
- (f) agitating the waste water in the treatment tank in order to thoroughly mix it;
- (g) allowing solids to settle to form a sludge phase;
- (h) separating a purified water phase from the treatment tank;
- and,
- (i) filtering and drying the reaming sludge phase.
A process for the treatment of metal-containing waste water and hazardous wastes generated from a radiator service shop comprising:
- (a) agitating said waste water and hazardous wastes in a treatment tank;
- (b) adjusting the pH of the waste water in the treatment tank from about 6 to about 11;
- (c) adding thereto aluminum sulfate, previously dissolved in water, and agitating the resultant mixture;
- (d) adding to the resulting mixture an organic polyelectrolyte, previously dissolved in water, and agitating the mixture;
- (e) adding to the resulting mixture a copolymer of sodium acrylate and acrylamide dispersed in mineral oil and agitating the mixture;
- (f) agitating the mixture in the treatment tank for a period of from about one hour to about three hours;
- (g) allowing the mixture to settle for from about one hour to about overnight;
- (h) separating a purified water phase from the mixture;
- and
- (i) filtering and drying the sludge phase.
Dependencies are inferred from the claim text.