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:
Feb. 01, 2011
Filed:
Jan. 24, 2007
Yasuhiro Baba, Osaka, JP;
Hiroaki Fujii, Kurashiki, JP;
Hidehiko Okabe, Saijo, JP;
Goro Kobayashi, Chuo-ku, JP;
Tsutomu Miura, Kurashiki, JP;
Yasuhiro Baba, Osaka, JP;
Hiroaki Fujii, Kurashiki, JP;
Hidehiko Okabe, Saijo, JP;
Goro Kobayashi, Chuo-ku, JP;
Tsutomu Miura, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
To provide an inexpensive wastewater treatment method which facilitates downsizing of tanks and requires less withdrawal of an excessive sludge, the use is made of an aeration tankin which wastewater is contacted with a particulate carrier under an aerobic condition, and a total oxidization tankin which the volume of a sludge generated in the aeration tankis reduced under an aerobic condition, a coefficient of self-oxidization of the sludge flowing into the total oxidization tankis set to 0.05 (per day), and the method includes a step of adding a coagulant to the total oxidization tankfor the purpose of improving the solid-liquid separating characteristic of the sludge within the total oxidization tank.