| abstract |
A METHOD AND APPARTAUS FOR THE CULTIVATION OF MICROORGANISMS WHEREIN THE PUMPING EFFICIENCY OF CULTIVATED BROTH REMOVED FROM THE CULTIVATION ZONE IS IS IMPROVED BY FIRST SUBJECTING THE REMOVED CULTIVATED BROTH TO A SEPARATION STEP WHEREIN AERATED BROTH IS SEPARATED FROM PARTIALLY DE-AERATED BROTH UNDER THE ACTION OF THE DENSITY DIFFERENTIAL BETWEEN AERATED BROTH AND PARTIALLY DE-AERATED BROTH, AND THEREAFTER PUMPING PARTIALLY DE-AERATED BROTH BACK TO THE CULTIVATION ZONE. THE PROCESS IS PARTICULARLY SUITED TO FERMENTATIONS HAVING EXTERNAL HEAT EXCHANGE MEANS AND IN WHICH THE CULTIVATED BROTH IS HIGHLY AERATED. |