Process for the removal of sulfate and metals from aqueous solut

Details Process for the removal of sulfate and metals from aqueous solut Process for the removal of sulfate and metals from aqueous solut

1984-06-01

1985-05-28

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210616, 210912, C02F 334

Patent

active

045199124

ABSTRACT:
A process is provided for reducing the concentrations of water soluble ionic selenium species, sulfate ion and ionic heavy metal species 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 anaerobic bacteria of the genus Clostridium and at least one anaerobic bacteria selected from the group consisting of 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 contacts 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 ionic selenium species to water insoluble selenium metal and the conversion of the water soluble ionic heavy metal species to water insoluble heavy metal species, both of which are substantially retained on the porous matrix and both of which can be recovered 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
Sorg et al., "Removal of Selenium from Drinking Water-State of the Art", Symposium on Selenium-Tellurium in the Environment, 5/11-13, 1976, pp. 114-128.

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