Device for supplying and discharging a medium; culture vessel having such a device and method of cultivating microbiological systems by using such a culture vessel

A culture vessel, comprising

• a vessel body configured to accommodate a medium and extending from an upper side to a bottom side, and
• at least one device configured to supply or discharge the medium into or out of the vessel body and arranged on the upper side of the vessel body, the at least one device comprising:
• a housing,
• a first aperture and a plurality of second apertures arranged on the housing,
• the plurality of second apertures being connected with the first aperture in a fluid-conducting manner to supply the medium from the first aperture via the plurality of second apertures into an interior of the vessel body or to discharge the medium from the interior of the vessel body in a reversed direction, such that a plurality of medium sub-streams, arranged in parallel to one another, of the medium to be supplied or to be discharged are generated, wherein
• the first aperture is connected with each of the plurality of second apertures respectively via one of a plurality of fluid conduits arranged in parallel to one another, wherein at least one of the plurality of fluid conduits is directed, at least in sections thereof, perpendicularly to the bottom side of the vessel body, and
• wherein the plurality of fluid conduits are provided by a plurality of nozzles, wherein at least one of the plurality of nozzles is configured as a laminar nozzle for producing a laminar medium sub-stream of the medium that is to be supplied, wherein the laminar nozzle has a Reynolds number that is below 2300 for a flow velocity, and the medium has a viscosity sufficient for cell culture.