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. 11, 1999
Filed:
Nov. 01, 1996
Applicant:
Inventors:
Assignee:
Stauffer Management Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C12P / ;
U.S. Cl.
CPC ...
4352625 ; 435170 ; 435264 ; 435267 ; 435822 ; 71 15 ; 71 21 ; 71 25 ; 71903 ; 588207 ;
Abstract
The present invention provides a process of decontaminating, by composting under specific conditions, soil and/or sediments containing certain toxic cyclical organic compound contaminants by converting these contaminants into harmless materials. The compounds include chlordane, dieldrin, toxaphene, aldrin, endrin, and heptachlorepoxide. The process includes the step of affecting a solid compost mixture during composting with a redox potential below negative 200 mV (millivolts). Further, the process includes several steps which are repeated until an amount of contaminant is degraded to less than 140 ppm (part per million) per ton of soil.