Treatment of a suspension in a bioreactor with integrated hydraulic bottom layer removal
First Claim
1. A process for biological treatment of a suspension in a bioreactor comprising a central outlet area near the bottom and a vertically aligned guide zone, said process comprising:
- circulating a suspension within said bioreactor, wherein at least some of the suspension is routed upward through said vertically aligned guide zone by the injection of gas into the vertically aligned guide zone, whereby a vertical flow of at least a portion of the suspension is produced downward outside of the vertically aligned guide zone; and
feeding at least one jet of fluid at an angle of 0 to 10°
downward from horizontal in the bottom part of the bioreactor, the jet superimposing on the downward vertical flow at the bottom part of the bioreactor, so as to establish a spiral flow to the central outlet area of the bioreactor.
1 Assignment
0 Petitions
Accused Products
Abstract
A process and a device for biological treatment of a suspension in a bioreactor (2) are described. To circulate the suspension, at least some of the suspension is routed through a vertically aligned guide zone (5) so that a vertical flow of the suspension is produced. To control sediment problems, it is suggested that by feeding a fluid, especially a free liquid jet, via at least one nozzle (11), a horizontal flow is superimposed on the vertical flow in the vicinity of the bottom of the bioreactor (2), by which a spiral flow to the central outlet area of the bioreactor (2) is produced (FIG. 1).
16 Citations
24 Claims
-
1. A process for biological treatment of a suspension in a bioreactor comprising a central outlet area near the bottom and a vertically aligned guide zone, said process comprising:
-
circulating a suspension within said bioreactor, wherein at least some of the suspension is routed upward through said vertically aligned guide zone by the injection of gas into the vertically aligned guide zone, whereby a vertical flow of at least a portion of the suspension is produced downward outside of the vertically aligned guide zone; and feeding at least one jet of fluid at an angle of 0 to 10°
downward from horizontal in the bottom part of the bioreactor, the jet superimposing on the downward vertical flow at the bottom part of the bioreactor, so as to establish a spiral flow to the central outlet area of the bioreactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A process for biological treatment of a suspension in a bioreactor comprising a central outlet area near the bottom and a vertically aligned guide zone, said process comprising:
-
circulating a suspension within said bioreactor, wherein at least some of the suspension is routed upward through said vertically aligned guide zone by the injection of gas into the vertically aligned guide zone, whereby a vertical flow of at least a portion of the suspension is produced downward outside of the vertically aligned guide zone; and feeding at least one jet of fluid at an angle of 0 to 10°
downward from horizontal in the bottom part of the bioreactor, the jet superimposing on the downward vertical flow at the bottom part of the bioreactor, so as to establish a spiral flow to the central outlet area of the bioreactor,wherein no moving parts are present in the bioreactor. - View Dependent Claims (17, 19, 21, 23)
-
-
16. A process for biological treatment of a suspension in a bioreactor comprising a central outlet area near the bottom and a vertically aligned guide zone, said process comprising:
-
circulating a suspension within said bioreactor, wherein at least some of the suspension is routed upward through said vertically aligned guide zone by the injection of gas into the vertically aligned guide zone, whereby a vertical flow of at least a portion of the suspension is produced downward outside of the vertically aligned guide zone; and feeding at least one jet of fluid at an angle of 0 to 10°
downward from horizontal in the bottom part of the bioreactor, the jet superimposing on the downward vertical flow at the bottom part of the bioreactor, so as to establish a spiral flow to the central outlet area of the bioreactor,wherein the means within said bioreactor for circulating the suspension, for providing the vertical flow, and for establishing said spiral flow to the central outlet area of the bioreactor consists essentially of the vertically aligned guide zone into which gas is introduced and the at least one jet of fluid at an angle of 0 to 10°
downward from horizontal. - View Dependent Claims (18, 20, 22, 24)
-
Specification