ISSN:
1432-0614
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Summary The effect of the periodic variation of the partial pressure of oxygen in the aeration gas on biomass concentrations, ethanol conversion, yield and productivity during continuous cultivations of the yeast Candida utilis in a multistage tower fermentor was studied. The results were compared with those obtained under aeration conditions with a constant PO 2 in the aeration gas. The results demonstrated that, with the optimum PO 2 in the aeration gas, the aeration procedure with the periodic variation of PO 2 in the gas phase permitted achievement of the same process parameters as those under constant PO 2. Using this new aeration procedure, the consumption of pure oxygen can be lowered by 55% to 60%. In addition, the significance of the induction effect of PO 2 on growth characteristics in the individual stages of the fermentor was proved.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00503504
