The University of British Columbia

Fred A Koch

Ahren Britton

Donald S Mavinic

Noboru Yonemitsu

Ahren Thomas Britton

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.

Fluidized bed wastewater treatment apparatus

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.

Growing community of inventors

Vancouver, Canada

Fred A Koch