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:
Apr. 22, 2003
Filed:
Feb. 04, 2000
Herbert E. Nuttall, Albuquerque, NM (US);
Yongming Lu, Savage, MD (US);
University of New Mexico, Albuquerque, NM (US);
Abstract
A method of in situ biodenitrification of a contaminated site comprising providing to a contaminated site a phosphorous source, namely a polyphosphate or a trimetaphosphate. The phosphorous source is provided to a saturated zone or an unsaturated zone and a carbon source is also provided, most preferably acetate. The invention is also of an in situ biodenitrification apparatus (FIG. ) comprising at least one extraction well for extracting subsurface water from a contaminated site, a container for mixing nutrients into the extracted water, and an injection well for re-introducing the extracted water to the subsurface. Preferably, at least three extraction wells are placed approximately on a circle having the injection well as a center, and a phosphorous source is introduced to the container, preferably a polyphosphate or a trimetaphosphate.