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:
Sep. 12, 2017
Filed:
Sep. 24, 2012
Hitachi, Ltd., Tokyo, JP;
Toray Industries, Inc., Tokyo, JP;
Kazuhiko Noto, Tokyo, JP;
Kotaro Kitamura, Tokyo, JP;
Yusuke Okawa, Tokyo, JP;
Hiroo Takabatake, Shiga, JP;
HITACHI, LTD., Tokyo, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
Provided is a fresh water generation system which filters biotreated water produced by microbiologically treating waste water via a primary semi-permeable membrane (), and then mixes concentrated water rejected by the filtration with seawater, thereby to filter the mixed water via a secondary semi-permeable membrane (). This system enables frequencies of chemical cleaning and replacement of the secondary semi-permeable membrane to be reduced. The fresh water generation system comprises: a primary semi-permeable membrane apparatus () which separates microorganism treating waste water into permeated water and concentrated water; a secondary semi-permeable membrane apparatus () which filters mixed water prepared by mixing the concentrated water into seawater. In the fresh water generation system, the primary semi-permeable membrane () has an equal to or a higher microorganism adhesive property than the secondary semi-permeable membrane ().