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:
Jul. 17, 2001
Filed:
Jun. 29, 1999
Kazuyuki Yamasaki, Hiroshima, JP;
Kazuyuki Sakata, Fukuyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Waste water containing fluorine, nitrogen and organic matter is treated by introducing the waste water into a water tank filled with calcium carbonate mineral and anaerobic microorganic sludge. An upper portion of the water tank is occupied by the anaerobic microorganic sludge concurrently with natural precipitation of the calcium carbonate mineral toward a lower portion of the water tank. Calcium ions dissolving from the calcium carbonate mineral precipitated in the lower portion of the water tank are made to chemically react with the fluorine in the waste water. At the same time, the organic matter in the waste water is treated by utilizing anaerobic microorganisms in the anaerobic microorganic sludge in the upper portion of the water tank. The nitrogen in the waste water is treated to be reduced by reducibility that the anaerobic microorganisms in the waste water own. There is thus provided the waste water treatment method and waste water treatment equipment capable of treating the waste water containing fluorine, nitrogen and organic matter at low cost without necessitating the organic matter such as methanol as an additional chemical.