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:
Mar. 07, 2000
Filed:
May. 18, 1998
Guy P Moser, Guelph, CA;
Neil C Gray, Oakville, CA;
Zenca, Inc., Wilmington, DE (US);
Abstract
A process of decontaminating soil containing pentachlorophenol (PCP) contaminant comprising admixing an organic nutrient material into soil in an amount of about 10% to 95% by weight of the soil mixture. The soil mixture forms a compost mixture. Composting the compost mixture at a temperature in the range of 20 to 65 degrees celsius. The water content of the compost mixture is maintained in a range of 40% to 100% water holding capacity (WHC). The redox potential level during the composting is below negative 200 mV to achieve partial degradation of the PCP contaminant. After composting, the compost mixture is oxygenated to raise the redox potential to positive 100 mV to further degrade the contaminant; and the steps are repeated until the PCP contaminant is present in an amount less than 140 ppm per ton of soil. The organic nutrient material comprises agricultural waste and municipal waste.