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:
Nov. 27, 2012
Filed:
Mar. 02, 2007
Koichiro Kando, Handa, JP;
Motoharu Noguchi, Handa, JP;
Koichiro Kando, Handa, JP;
Motoharu Noguchi, Handa, JP;
Metawater Co., Ltd., Minato-Ku, JP;
Abstract
When a separation membrane () is washed with a chemical solution that is a sodium hypochlorite solution, which has a high concentration, diluted with membrane treated water stored in a chemical solution tank (), an ammonic nitrogen concentration in membrane-treated water is monitored with a monitoring device (), and a control device () controls a chemical solution dosing pump () using the concentration measured by the device () to adjust a dilution rate. Thereby, even when water quality of membrane-treated water varies, a sodium hypochlorite concentration in backwashing water can be retained constant, and fluctuation in the chemical washing effect can be prevented.