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:
Oct. 26, 1999
Filed:
Dec. 29, 1997
Kenjiro Hongo, Tokyo, JP;
Hongo Company Limited, Tokyo, JP;
Abstract
A waste water purifying apparatus utilizes microorganisms, which comprises an inner casing (1), an outer casing (2), a waste water supply tank (3) and an air supply pipe (4). The inner casing is a vertical type and its upper and lower end are open. Plural porous discs 7 of polyethylene which have liquid passages (6) are piled in the inner casing with each space between every two carrier discs. The outer casing is a vertical type whose bottom is closed by a bottom cap (12) and arranged coaxially with the inner casing with a downward circuit (13) for liquid there between. The outer casing has outflow ports (14) for the treated water. The waste water supply tank is for having waste water a head to flow into the outer casing, above which a waste water supply pipe (15) is open. The tank communicates with the outer casing by means of a leading pipe (19) and it is provided with an overflow to keep a water level constant. The air supply pipe is connected with an air scattering disc (22) below the lower end of the inner casing.