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. 18, 2008
Filed:
May. 26, 2005
Hiroyuki Umezawa, Ota, JP;
Masahiro Iseki, Kumagaya, JP;
Daizo Takaoka, Ota, JP;
Motoyuki Tsuihiji, Ota, JP;
Takashi Igarashi, Ojiya, JP;
Hiromichi Ohtake, Ojiya, JP;
Hiroyuki Umezawa, Ota, JP;
Masahiro Iseki, Kumagaya, JP;
Daizo Takaoka, Ota, JP;
Motoyuki Tsuihiji, Ota, JP;
Takashi Igarashi, Ojiya, JP;
Hiromichi Ohtake, Ojiya, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
Provided are a treatment apparatus for removing fluorine content from water to be treated and a method of treating water to be treated using the same. Water to be treated, containing fluorine, is introduced into a treatment tank over a first path. Slaked lime is added to the water to be treated over a second path. Calcium chloride is added to the water to be treated over a third path. Thus, the fluorine contained in the water to be treated combines with calcium forming slaked lime or calcium chloride, thus yielding calcium fluoride, which is immobilized. When a filter film immersed in the water to be treated is used for filtration, the calcium fluoride contained in the water to be treated is concentrated.