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:
Sep. 11, 2007
Filed:
May. 03, 2006
Kazuichi Isaka, Tokyo, JP;
Tatsuo Sumino, Tokyo, JP;
Kazuichi Isaka, Tokyo, JP;
Tatsuo Sumino, Tokyo, JP;
Abstract
An apparatus for removing nitrogen is provided herein. In the apparatus, the nitrogen is removed from wastewater containing a BOD component and ammonium nitrogen by anaerobic ammonium oxidation. The apparatus includes a distributor, which distributes the wastewater into two portions; a nitrification vessel which connects to a first portion of said two portions, in which ammonia contained in wastewater distributed to the first portion is nitrified by ammonium oxidizing bacteria; a denitrification vessel which connects to a second portion of said two portions, in which wastewater distributed to the second portion is denitrified by denitrification bacteria; an anaerobic ammonium oxidation vessel, in which mixed water of first treated water from the nitrification vessel and second treated water from the denitrification vessel is subjected to anaerobic ammonium oxidation by ammonium oxidizing bacteria; and a returning line which feeds back a third treated water from the anaerobic ammonium oxidation vessel to the denitrification vessel for denitrification and BOD decomposition.