PURPOSE: To obtain the subject apparatus, having a structure of many bundled hollow yarns with oxygen-enriching performance and capable of feeding air in a high oxygen concentration into a culture solution with low foaming and evaporation by dipping the bundle in the culture solution and feeding compressed air thereto.
CONSTITUTION: Hollow yarns 2 having oxygen-enriching performance are arranged around a hollow pipe 3 for introducing air and both ends of the hollow yarns 2, together with the hollow pipe 3, are sealed in joining parts 5 and 9. The one joining part 5 is closed with a cap and the hollow pipe 3 and the hollow yarns 2 are communicated to connect the other joining part 9 through a cap 11 to an air conduit pipe 13. The air conduit pipe 13 and hollow pipe 3 for introducing air are respectively provided with pressure control valves 14 and 15. The hollow yarns are preferably formed from an aromatic polyamide or polyarylate having heat resistance, since thermal sterilization can be carried out.
KANEDA TSUTOMU
SHIMOMURA BUNJI
