The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1985
Filed:
Jun. 01, 1984
Jim W Kauffman, Edmond, OK (US);
William C Laughlin, Edmond, OK (US);
Roger A Baldwin, Oklahoma City, OK (US);
Kerr-McGee Corporation, Oklahoma City, OK (US);
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.