ISSN:
0138-4988
Keywords:
Life Sciences
;
Life Sciences (general)
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Floc formation, especially the influence of floe diameter variations on the total velocity of the process, was investigated in aerobic growth processes of yeast on the hydrocarbons of crude oil.The experimental results show that the diameter of the flocs is a function of the rheological properties of the fluids and the flow conditions.The floc diameter varies between 0,1 mm and a few millimeters. About 90% of the total yeast cells are situated in the interior of the flocs.Since oxygen must be transferred to all yeast cells their oxygen supply was studied.Thus, the yeast cells in the floc interior were not sufficiently supplied with oxygen, if the floc diameter reached a critical value.In such cases a decrease of the biomass formation rate was observed, although the dissolved oxygen concentration of the aquaeous fermentation medium was greater than zero. Therefore, aerobic microbial growth processes in multicomponent systems must be carried out without floc formation or under such conditions as cause very small floc diameters.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/abio.370020104
