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:
May. 16, 2000
Filed:
Aug. 10, 1998
Kazuyuki Yamasaki, Hiroshima, JP;
Kazuyuki Sakata, Fukuyama, JP;
Atsushi Yokotani, Kurashiki, JP;
Noriyuki Tanaka, Fukuyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a third tank, calcium carbonate mineral is filled to react with fluorine in treatment water. Then, generated treatment water containing calcium fluoride is aerated and stirred so that aerobic microorganisms are propagated, by which organic matters are treated. A fourth water tank is to perform treatment of hydrogen peroxide by anaerobic microorganisms in return sludge from a sixth tank, treatment of phosphorus by slaked lime newly added in a small amount, and secondary treatment (advanced treatment) of fluorine that has already been primarily treated in the third tank. In a fifth tank, flocs are coagulated. In the sixth tank, the coagulants are settled and separated so as to be discharged as treated water. Thus, mixed waste water of hydrogen-peroxide- and phosphorus-containing fluorine waste water and organic-matter-containing waste water is treated simultaneously with low running cost and maintenance cost.