Liquid purification or separation – Processes – Treatment by living organism
Patent
1984-06-01
1985-06-11
Wyse, Thomas
Liquid purification or separation
Processes
Treatment by living organism
210616, 210912, C02F 334
Patent
active
045227233
ABSTRACT:
A process is provided for reducing the concentration of water soluble ionic heavy metal species and sulfate ions in aqueous waste solutions containing the same. The process comprises passing said waste solution through a treatment zone containing a porous matrix on which are retained populations of at least one bacteria of the genera Desulfovibrio and Desulfotomaculum. The passing of said aqueous solution through said treatment zone is carried out at predetermined rates of flow, and contact between said solution and said bacteria is conducted under anaerobic conditions and at predetermined pH and temperature levels. The process provides for the conversion of the water soluble sulfate ions to hydrogen sulfide and reaction between said hydrogen sulfide and water soluble ionic heavy metal species to water insoluble heavy metal species which are substantially retained on the porous matrix and which are recoverable therefrom.
REFERENCES:
patent: 4108722 (1978-08-01), Stover
patent: 4124501 (1978-11-01), Yen et al.
patent: 4200523 (1980-04-01), Balmat
patent: 4332904 (1982-06-01), Kurane et al.
patent: 4354937 (1982-10-01), Hallberg
Kauffman Jim W.
Laughlin William C.
Addison William G.
Kerr-McGee Corporation
Ward John P.
Wyse Thomas
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