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:
Nov. 30, 2004
Filed:
Sep. 27, 2002
Applicant:
Inventors:
Yosei Katsu, Kanagawa, JP;
Toshihiro Tanaka, Kanagawa, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C02F 3/12 ;
U.S. Cl.
CPC ...
C02F 3/12 ;
Abstract
A wastewater treatment process involves solids-liquid separation after biological treatment, in which solids-liquid separation of activated sludge can be more efficiently performed. A mixture of wastewater and activated sludge obtained after biologically treating raw wastewater is introduced into a solids-liquid separation tank containing a water-permeable filter immersed therein and a dynamic filter layer of sludge is formed on the surface of the water-permeable filter to give a filtrate from the water-permeable filter.