Process and device for biological treatment of a suspension in a bioreactor with integrated hydraulic bottom layer removal
First Claim
1. In a process for biological treatment of a suspension in a bioreactor that has a central outlet area near the bottom and in which to circulate the suspension, at least some of the suspension is routed through a vertically aligned guide zone so that a vertical flow of at least a portion of the suspension is produced, which flow extends into the vicinity of the bottom of the bioreactor or proceeds from the vicinity of the bottom of the bioreactor, the improvement comprising feeding at least one horizontal jet of fluid superimposing on the vertical flow in the bottom part of the bioreactor, so as to establish a spiral flow to the central outlet area of the bioreactor.
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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).
14 Citations
25 Claims
- 1. In a process for biological treatment of a suspension in a bioreactor that has a central outlet area near the bottom and in which to circulate the suspension, at least some of the suspension is routed through a vertically aligned guide zone so that a vertical flow of at least a portion of the suspension is produced, which flow extends into the vicinity of the bottom of the bioreactor or proceeds from the vicinity of the bottom of the bioreactor, the improvement comprising feeding at least one horizontal jet of fluid superimposing on the vertical flow in the bottom part of the bioreactor, so as to establish a spiral flow to the central outlet area of the bioreactor.
- 16. A device for biological treatment of a suspension comprising a bioreactor for receiving the suspension, a vertically aligned guide means in the interior of the bioreactor that extends into the vicinity of the bottom region of the bioreactor for circulating the suspension, and further comprising at least one nozzle for feeding a fluid into the bioreactor in the vicinity of the bottom of the bioreactor.
Specification