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. 12, 2011
Filed:
Jun. 03, 2009
Shinichi Kosaka, Fujisawa, JP;
Shinichi Kosaka, Fujisawa, JP;
NGK Insulators, Ltd., Nagoya, JP;
NGK Filtech, Ltd., Chigasaki, JP;
Abstract
A wastewater treatment system including carbon dioxide gas injection means for injecting a carbon dioxide gas into wastewater which takes place during silicon processing to obtain raw wastewater to be treated; a wastewater tank; a filter membrane through which the raw wastewater is filtered; a liquid forwarding pump which forwards the raw wastewater to the filter membrane; and circulation/forwarding control means which can forward concentrated water and/or filtered water to the wastewater tank and which can regulate the pH of the raw wastewater to 4.0 to 6.5 to forward this wastewater to the filter membrane, when the amount of the raw wastewater present in the wastewater tank is below a reference amount.