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. 24, 2009
Filed:
Feb. 13, 2004
Fred A. Koch, Vancouver, CA;
Donald S. Mavinic, North Vancouver, CA;
Noboru Yonemitsu, Vancouver, CA;
Ahren T. Britton, Vancouver, CA;
Fred A. Koch, Vancouver, CA;
Donald S. Mavinic, North Vancouver, CA;
Noboru Yonemitsu, Vancouver, CA;
Ahren T. Britton, Vancouver, CA;
The University of British Columbia, Vancouver, CA;
Abstract
A fluidized bed reactor () for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. (A,B,C,D) The diameter of the column changes stepwise between the sections. A flow velocity in excess of 100 cm/min is maintained in a lowermost one of the sections and lower flow velocities are maintained in subsequent sections. A struvite supersaturation ratio is controlled in part by recycling wastewater from an outlet of the column. Struvite pellets are removed periodically from the bottom of the column.