Process and device for biological treatment of a suspension...

Details Process and device for biological treatment of a suspension... Process and device for biological treatment of a suspension...

2007-03-06

2007-03-06

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Recirculation

C220S550000, C220S220000, C220S525000, C220S800000

Reexamination Certificate

active

10883961

ABSTRACT:
A process and a device for biological treatment of a suspension in a bioreactor, wherein the suspension is circulated, at least some of the suspension is routed through a vertically aligned guide zone in the bioreactor so that a vertical flow of the suspension is produced. The top scum in the area of the suspension fill level is controlled by feeding a fluid, especially in the form of a free liquid jet, into the bioreactor via at least one nozzle at the fill level, such that the surface of the suspension and/or the top scum floating on the surface of the suspension is forced into rotary flow.

REFERENCES:
patent: 5089118 (1992-02-01), Mahoney et al.
patent: 5409610 (1995-04-01), Clark et al.
patent: 5942116 (1999-08-01), Clark et al.

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