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, 1996
Filed:
May. 26, 1995
Kazuyuki Yamasaki, Hiroshima, JP;
Yoshihiro Hamaguchi, Kurashiki, JP;
Shunji Hosoda, Fukuyama, JP;
Kazuyuki Sakata, Fukuyama, JP;
Takashi Imai, Fukuyama, JP;
Shigetoshi Okatani, Fukuyama, JP;
Satoshi Nishio, Fukuyama, JP;
Tuyoshi Takahashi, Fukuyama, JP;
Kenji Matuura, Fukuyama, JP;
Noriyuki Tanaka, Fukuyama, JP;
Teruaki Nagayasu, Fukuyama, JP;
Hiroshi Makino, Fukuyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An apparatus for waste water treatment, wherein fluorine contained in waste water is treated into a fluoride through a chemical reaction and sludge containing the fluoride is thickened and dehydrated into a sludge cake, has first and second tanks each packed with calcium carbonate mineral. In the first tank, waster water containing fluorine is agitated by air discharged from an air diffuser and caused to react with the calcium carbonate mineral. Through this reaction of the waste water with the calcium carbonate mineral and action of microorganisms on the surface of the calcium carbonate mineral, a pH value and a fluorine concentration of the waste water is adjusted till the pH value and the fluorine concentration fall within their respective predetermined ranges. In the second tank, an aluminum agent is added to the waste water coming from the first tank while the waste water being agitated so that the pH value and the fluorine concentration of the waste water are further adjusted through a chemical reaction of the fluorine with the calcium carbonate mineral and aluminum agent and action of microorganisms propagating on the surface of the mineral so as to fall within their respective target ranges.