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. 08, 2005
Filed:
Feb. 11, 2003
Glen T. Daigger, Highlands Ranch, CO (US);
Albert M. Wollmann, Gainesville, VA (US);
Sudhir N. Murthy, Reston, VA (US);
Edwin J. Fleischer, Ashburn, VA (US);
Thomas A. Broderick, Leesburg, VA (US);
Glen T. Daigger, Highlands Ranch, CO (US);
Albert M. Wollmann, Gainesville, VA (US);
Sudhir N. Murthy, Reston, VA (US);
Edwin J. Fleischer, Ashburn, VA (US);
Thomas A. Broderick, Leesburg, VA (US);
CH2M Hill, Inc., Englewood, CO (US);
Abstract
An apparatus using activated sludge for the removal of biological nutrients from a wastewater includes a bioreactor for containing a mixture of wastewater under treatment and activated sludge. The bioreactor is divided into a plurality of serially connected treatment zones and includes a wastewater inlet, a downstream aerobic zone and an upstream aerobic zone between the wastewater inlet and the downstream aerobic zone, the upstream and downstream aerobic zones being separated by an anoxic zone. A method for removal of nutrients from a wastewater includes providing a wastewater to an inlet of a serial, multi-zone, activated sludge bioreactor containing an activated sludge. The bioreactor has a downstream aerobic zone from which water is removed and an upstream aerobic zone between the wastewater inlet and the downstream aerobic zone, the upstream and downstream aerobic zones being separated by an anoxic zone.