The University of British Columbia

Noboru Yonemitsu

Ahren Britton

Donald S Mavinic

Fred A Koch

Michael Isaacson

Kaluarachchige Dharmapriya Wijewickreme

Ruslan Shanth Amarasinghe

Fred Koch

Donald Mavinic

Ahren Thomas Britton

A device for determining a height of soil above a structure buried below a soil bed includes a sensor assembly comprising a total stress pressure sensor for transmitting a first signal indicating a total pressure, a pore water pressure sensor located proximate to the total stress pressure sensor, the pore water pressure sensor for transmitting a second signal indicating a fluid pressure, a sensor module configured to receive the first and the second signals, determine a difference between the first signal and the second signal, based on the difference between the first signal and the second signal, determine a height of soil above the sensor assembly, and transmit a third signal indicating the height of soil to an external device.

Apparatus and method for monitoring loss of soil cover

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.

Fluidized bed wastewater treatment

Growing community of inventors

Vancouver, Canada

Noboru Yonemitsu