Fluidized bed wastewater treatment apparatus

Details Fluidized bed wastewater treatment apparatus Fluidized bed wastewater treatment apparatus

2011-04-12

2011-04-12

Hruskoci, Peter A (Department: 1776)

Liquid purification or separation

Constituent mixture variation responsive

C210S143000, C210S188000, C210S195100, C210S199000, C210S205000, C210S206000, C422S140000, C422S145000, C422S147000

Reexamination Certificate

active

07922897

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.

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