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:
Dec. 03, 2013
Filed:
Jan. 11, 2011
Hisashi Isogami, Tokyo, JP;
Akira Mochizuki, Tokyo, JP;
Hiroshi Sasaki, Tokyo, JP;
Tadashi Sano, Ushiku, JP;
Satoshi Miyabayashi, Tokyo, JP;
Hisashi Isogami, Tokyo, JP;
Akira Mochizuki, Tokyo, JP;
Hiroshi Sasaki, Tokyo, JP;
Tadashi Sano, Ushiku, JP;
Satoshi Miyabayashi, Tokyo, JP;
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Abstract
A wastewater treatment method in which magnetic flocs are formed by adding to wastewater an inorganic flocculant, magnetic particles, and a high molecular polymer as a polymeric flocculant, and the magnetic flocs are collected with magnetic force to thereby obtain treated water having the magnetic flocs removed from the wastewater, wherein the improvement comprises that the magnetic particles are added to the wastewater after adding the inorganic flocculant to the wastewater to flocculate suspended solids in the wastewater, after that or substantially at the same time as the magnetic particles are added, the high molecular polymer is added to the wastewater, and flocculates of the suspended solids and the magnetic particles are combined with each other with the high molecular polymer to thereby obtain the magnetic flocs.