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:
Oct. 17, 2000
Filed:
Dec. 17, 1997
Isao Joko, Kanagawa, JP;
Satoshi Miwa, Kanagawa, JP;
Kurita Water Industries Ltd., , JP;
Abstract
Waste water containing nitrogen compounds is treated by first breaking the nitrogen compounds down by electrolysis in the presence of chlorine ions. The electrolysis step converts chlorine ions to hypochlorite ions. The partially treated water is returned to a storage container. The hypochlorite ions oxidize the nitrogen compounds and are reconverted to chlorine atoms. The partially treated water then may be returned to the electrolysis container to regenerate hypochlorite ions. In a second step, the partially treated waste water is passed over a metal peroxide catalyst. The metal peroxide catalyst further breaks down the nitrogen compounds, and removes the excess hypochlorite ions.