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:
Jul. 08, 2003
Filed:
May. 22, 2001
Bruno Bujon, Chatou, FR;
Philippe Caulet, Bailly, FR;
Jean-Pierre Philippe, Herblay, FR;
Patrice Chatellier, Paris, FR;
Suez Lyonnaise des Eaux, Nanterre Cedex, FR;
Abstract
Process for controlling the retention time of the sludge undergoing clarification in a process for treating wastewater by activated sludge comprising a recirculation of the activated sludge from the clarification stage into the biological basins, characterized in that the rate of sludge recirculation (Q ) is varied so as to maintain a constant recirculated sludge concentration (C ) while at the same time guaranteeing a retention time (RT) of the sludge undergoing clarification of less than a critical value (RT ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile