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:
Aug. 22, 2000
Filed:
Nov. 02, 1998
Susumu Hasegawa, Kobe, JP;
Akira Akashi, Kobe, JP;
Shinko Pantec Co., Ltd., Hyogo, JP;
Abstract
A method of treating an organic waste water, which is capable of separating and recovering phosphorus components in a liquid or solid form, is provided. According to the method of the present invention, reuse of phosphorus components can be facilitated, while the content of phosphorus components contained in a large quantity of a primary treated liquid can be reduced. The following steps are utilized in the method of the present invention: (1) an aeration step for aerobically treating a waste water; (2) a solid-liquid separation step for separating the waste water after the aeration into a primary treated liquid and a primary sludge; (3) a phosphorus component release step for releasing phosphorus components from the separated primary sludge to a liquid phase; and (4) a solid-liquid separation step for separating the primary sludge after releasing the phosphorus components into a secondary treated liquid containing the released phosphorus components and a secondary sludge essentially free from phosphorus components.