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:
May. 20, 2008
Filed:
Mar. 31, 2006
Applicants:
Gerardo Buelna, Québec, CA;
Rino Dubé, Beauport, CA;
Yann Le Bihan, Cap-Rouge, CA;
Inventors:
Assignee:
Centre de Recherche industrielle du Quēbec, Quebec, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 3/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
The biofilter is used for the purification of a waste liquid using layers of filtering material, wherein the waste liquid moves downwardly by gravity while an O-containing gas moves upwardly therein. The biofilter comprises a gas collector to capture at least a portion of the gas moving upwardly therein to mitigate the problem of biofilter clogging due to a microbial seal at the surface of the uppermost filtering layer.