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:
Apr. 15, 2003
Filed:
Aug. 30, 2001
Takaaki Maekawa, Ibaraki, JP;
Daishin Design Corporation, Hokkaido, JP;
Abstract
Disclosed is a novel method for treatment of wastewater containing organic contaminant materials by oxidatively decomposing the contaminant materials by a radical reaction involving hydroxyl radicals. The method comprises passing the wastewater through a wastewater treatment conduit ( ) comprising a straightly tubular member ( ) and a radical generating part consisting of a truncated pyramidal or conical tubular member ( ) having an inner surface layer of titanium dioxide to serve as a positive electrode and connected to the upstream end of the straightly tubular member and a negative electrode rod ( ) coaxially held relative to the truncated tubular member and applying a pulsed DC voltage having a rectangular wave form at a specified frequency. The efficiency of wastewater treatment can be improved by providing an ultrasonic part consisting of a truncated tubular member similar ( ) to the above and connected to the downstream end of the straightly tubular member and an ultrasonic vibrator ( ) mounted thereon to emit pulsed ultrasonic waves.