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:
Jun. 11, 1985
Filed:
Jun. 01, 1984
Jim W Kauffman, Edmond, OK (US);
William C Laughlin, Edmond, OK (US);
Kerr-McGee Corporation, Oklahoma City, OK (US);
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.