Process and plant for the culture of microorganisms.

摘要

1. Process for the culture of microoganisms under aerobic conditions in a liquid nutritive medium subjected to an oxygenation maintaining the contents of dissolved oxygen in the said medium above a critical freshhold, characterized by the following steps : a) an initial phase of the culture is assured exclusively by aeration with the atmospheric air while a phase following this is ensured exclusively by circulation recycling a gaseous charge initially constituted essentially of air, to which industrially clean oxygen is supplied in a regulated manner, which exigen is determined to compensate substantially the said consumption ; b) the commutation of the initial phase with oxygenation exclusively by air with the subsequent phase with oxygenation by adding exclusively industrially clean oxygen is effected, when the contents of dissolved oxygen is approaching the critical value specific for the cultivated microorganisms.