Patents by Inventor Fred A. Koch

Fred A. Koch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fluidized bed wastewater treatment apparatus
    Patent number: 7922897
    Abstract: A fluidized bed reactor for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. 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.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: April 12, 2011
    Assignee: The University of British Columbia
    Inventors: Fred A. Koch, Donald S. Mavinic, Noboru Yonemitsu, Ahren Thomas Britton
  • FLUIDIZED BED WASTEWATER TREATMENT APPARATUS
    Publication number: 20100047134
    Abstract: A fluidized bed reactor for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. 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.
    Type: Application
    Filed: October 13, 2009
    Publication date: February 25, 2010
    Applicant: THE UNIVERSITY OF BRITISH COLUMBIA
    Inventors: Fred A. KOCH, Donald S. MAVINIC, Noboru YONEMITSU, Ahren Thomas BRITTON
  • Fluidized bed wastewater treatment
    Patent number: 7622047
    Abstract: A fluidized bed reactor (14) for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. (15A, 15B, 15C, 15D) 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.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: November 24, 2009
    Assignee: The University of British Columbia
    Inventors: Fred A. Koch, Donald S. Mavinic, Noboru Yonemitsu, Ahren T. Britton
  • Fluidized Bed Wastewater Treatment
    Publication number: 20080257826
    Abstract: A fluidized bed reactor (14) for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. (15A, 15B, 15C, 15D) 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.
    Type: Application
    Filed: February 13, 2004
    Publication date: October 23, 2008
    Applicant: THE UNIVERSITY OF BRITISH COLUMBIA
    Inventors: Fred A. Koch, Donald S. Mavinic, Noboru Yonemitsu, Ahren T. Britton