Abstract: A method and a device are provided for the planar and spatial bending of rod-shaped components (2) having a longitudinal axis, such as pipes and profiles, including two roller systems A and B that are disposed behind each other along the longitudinal axis, wherein the component is driven by the roller system A and inserted into the roller system B, and is bent by a movement of the roller system B in a transverse direction to the longitudinal axis of the rod-shaped components (2). A device is also provided for the planar and spatial bending of rod-shaped components (2) having a longitudinal axis, such as pipes and profiles, including two roller systems A and B, wherein feed along the longitudinal axis can be effected via the roller system A, and the roller systems A, B are disposed in at least one first plane E1 in a displaceable manner relative to each other, wherein at least one of the roller systems A, B can be pivoted about the longitudinal axis.

Abstract: A method and a device are provided for the planar and spatial bending of rod-shaped components (2) having a longitudinal axis, such as pipes and profiles, including two roller systems A and B that are disposed behind each other along the longitudinal axis, wherein the component is driven by the roller system A and inserted into the roller system B, and is bent by a movement of the roller system B in a transverse direction to the longitudinal axis of the rod-shaped components (2). A device is also provided for the planar and spatial bending of rod-shaped components (2) having a longitudinal axis, such as pipes and profiles, including two roller systems A and B, wherein feed along the longitudinal axis can be effected via the roller system A, and the roller systems A, B are disposed in at least one first plane E1 in a displaceable manner relative to each other, wherein at least one of the roller systems A, B can be pivoted about the longitudinal axis.

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).

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.

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.