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:
Dec. 22, 1981
Filed:
Nov. 15, 1979
Applicant:
Inventors:
Takaai Tamura, Mitaka, JP;
Tomeyoshi Ozawa, Musashino, JP;
Wataru Ito, Hachiouji, JP;
Norihiko Fujita, Musashino, JP;
Naoki Negishi, Tokyo, JP;
Yukihiko Tamaki, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210201 ; 210220 ; 210255 ;
Abstract
An apparatus for purifying BOD-containing water by the action of activated sludge, which includes a vessel for containing activated sludge-containing liquid, and an aerator which is installed in the vessel. The aerator has a bubbler which successively takes out the liquid in the vessel for causing the liquid to absorb oxygen, and a settler which calmly returns the oxygen-rich liquid into the vessel.