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:
Jan. 31, 2006
Filed:
Jan. 21, 2004
Dominic A. Dragotta, Elkton, MD (US);
Vasantha Nagarajan, Wilmington, DE (US);
Stuart M. Thomas, Wilmington, DE (US);
Dominic A. Dragotta, Elkton, MD (US);
Vasantha Nagarajan, Wilmington, DE (US);
Stuart M. Thomas, Wilmington, DE (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A method has been developed to maintain the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced as an indicator of bioreactor health and regulating the concentration of feed nutrients and nitrate to maintain bioreactor health. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.