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:
Jun. 21, 2005
Filed:
Sep. 15, 2003
Pierre Lucien Cote, Oakville, CA;
Steven Kristian Pedersen, Burlington, CA;
Henry Behmann, Puslinch, CA;
Hidayat Husain, Brampton, CA;
Deonarine Phagoo, Toronto, CA;
Pierre Lucien Cote, Oakville, CA;
Steven Kristian Pedersen, Burlington, CA;
Henry Behmann, Puslinch, CA;
Hidayat Husain, Brampton, CA;
Deonarine Phagoo, Toronto, CA;
Zenon Environmental Inc., Oakville, CA;
Abstract
An apparatus to transfer gas to or from a liquid has a flexible and oxygen permeable but liquid water impermeable membrane, a flexible and gas permeable spacer, an inlet conduit, an outlet conduit and a non-rigid restrain system. When used for treating wastewater, an aerobic biofilm is culture adjacent the planar elements, an anoxic biofilm is cultivated adjacent the aerobic biofilm and the wastewater is maintained in an anaerobic state. A first reactor for treating wastewater has an anaerobic section, a plurality of gas transfer membrane modules, and an aerobic section. A biofilm is cultivated on the surface of the gas transfer membranes in fluid communication with the anaerobic section. Biological reduction of COD, BOD, nitrogen and phosphorous are achieved. In a second reactor, phosphorous is also removed chemically in a precipitation branch.