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. 12, 2015
Filed:
Sep. 22, 2011
Applicants:
Motoharu Noguchi, Tokyo, JP;
Hideki Kozono, Tokyo, JP;
Michiko Aoki, Tokyo, JP;
Inventors:
Assignee:
Metawater Co., Ltd., Chiyoda-Ku, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/44 (2006.01); C02F 1/52 (2006.01); B01D 65/06 (2006.01); C02F 1/78 (2006.01); C02F 9/00 (2006.01); B01D 65/02 (2006.01); C02F 1/28 (2006.01); C02F 1/56 (2006.01); C02F 103/20 (2006.01);
U.S. Cl.
CPC ...
C02F 9/00 (2013.01); B01D 65/02 (2013.01); B01D 2321/168 (2013.01); C02F 1/281 (2013.01); C02F 1/444 (2013.01); C02F 1/5236 (2013.01); C02F 1/56 (2013.01); C02F 1/78 (2013.01); C02F 2103/20 (2013.01); C02F 2209/03 (2013.01); C02F 2209/11 (2013.01); C02F 2303/16 (2013.01);
Abstract
The process includes operation as follows: putting ozone generated by an ozone generator into raw water, in a normal mode, to subject the raw water to ozone treatment; injecting a flocculant into the raw water before or after the ozone treatment; filtering the raw water by a separation membrane after the ozone treatment and the injection of the flocculant; and intermittently setting cleaning mode to put a larger quantity of cleaning ozone than that in the normal mode into the raw water so as to intermittently increase the concentration of dissolved ozone, thereby cleaning the filtration membrane.