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. 25, 1993
Filed:
Sep. 09, 1991
Applicant:
Inventor:
Peter Kos, Ridgefield, CT (US);
Assignee:
T. Kruger, Inc., Cary, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210605 ; 210610 ; 210621 ; 210629 ; 210903 ; 210906 ;
Abstract
The present invention relates to a system and method for biologically removing nitrogen from wastewater. Both the system and method entails forming a mixed liquor and transferring the mixed liquor to a series of nitrogen removal stages. Each nitrogen removal stage includes both anoxic and aerobic treatment zones. Mixed liquor is recycled back and forth between the anoxic and aerobic treatment zone of each stage. Because of this basic flow scheme, the process gives rise to a high reactor rate and highly efficient nitrogen removal process.