Apparently dry waste management system
AssigneeEastman Kodak Company
InventorsJeffrey L. Hall, Faye Transvalidou, Lloyd A. Lobo
Life of this patent
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Abstract
A method of disposing of photographic silver halide processing solutions including developer, bleach and at least one silver bearing solution comprising a) combining the developer and bleach solutions to oxidize the developing agent in the developer and form a developer/bleach waste solution, b) treating the silver bearing solution(s) to reduce the silver ion level and form a low silver waste solution; and c) contacting the developer/bleach waste solution and the low silver waste solution with an absorbent material to form an apparently dry waste material having a leachable silver ion level below 5 ppm.
Claims28
A method of disposing of photographic silver halide processing solutions including developer solution, bleach solution and at least one silver bearing solution comprising a) combining only the developer and bleach solutions to oxidize the developing agent in the developer and form a developer/bleach waste solution, b) treating the silver bearing solution(s) to reduce the silver ion level and form a low silver waste solution;
- and c) contacting the developer/bleach waste solution and the low silver waste solution with an absorbent material to form an apparently dry waste material having a leachable silver ion level below 5 ppm.
A method of disposing of photographic silver halide processing solutions including developer solution, bleach solution and at least one silver bearing solution comprising a) combining the developer and bleach solutions to oxidize the developing agent in the developer and form a developer/bleach waste solution, b) treating the silver bearing solution(s) by contacting the solutions with a precipitating agent which will precipitate silver salts to reduce the silver ion level and form a low silver waste solution;
- and c) contacting the developer/bleach waste solution and the low silver waste solution with an absorbent material comprising gelatin to form an apparently dry waste material having a leachable silver ion level below 5 ppm.
Dependencies are inferred from the claim text.