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. 11, 2014
Filed:
Mar. 25, 2010
Kiyokazu Takemura, Tokyo, JP;
Makoto Onishi, Tokyo, JP;
Shinichi Yoshikawa, Tokyo, JP;
Masami Ito, Tokyo, JP;
Shinjiro Ueda, Tokyo, JP;
Kiyokazu Takemura, Tokyo, JP;
Makoto Onishi, Tokyo, JP;
Shinichi Yoshikawa, Tokyo, JP;
Masami Ito, Tokyo, JP;
Shinjiro Ueda, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A sewage treatment apparatus includes a membrane separation active-sludge treating section which performs a biological treatment on a part of sewage, which is introduced by a water introducing section while flowing through a sewer trunk line, to generate first treated sewage; a membrane highly treating section which performs a membrane high treatment on the first treated sewage to generate second treated sewage; a membrane treating tank which stores the first treated sewage; a membrane highly treating tank which stores the second treated sewage; water level sensors which respectively measure water level of the membrane treating tank and the membrane highly treating tank; and a power-control section which controls water introducing quantity of the water introducing section on the basis of the water level data measured by the water level sensors.