Oxygen Transfer in Hydrocarbon Fermentation by Candida rugosa

概要

論文の詳細を見る
In the cultivation of a yeast, Candida rugosa, using hydrocarbon as substrate, the characteristics of oxygen transfer and uptake of oxygen by cells are quite different to that using carbohydrate as substrate. This is due to aggregative flocks of oil, cells, and bubbles caused by the higher affinity of cells for oil and to changes in surface activity.A dynamic method for estimating volumetric oxygen transfer coefficients between the gas and aqueous phases (k_La)_<gw>, the gas and oil phases (k_La)_<go> and the oil and aqueous phases (k_La)_<ow> and oxygen uptake rete form the aqueous and oil phases during cultivation was developed.During growth lower values of (k_La)_<gw> and (k_La)_<ow>, and higher values of (k_La)_<go> were obtained than in the lag and stationary phases in which the dispersion state of cells and bubbles was similar to that in a non-biological system. Oxygen uptake rate of yeast cells from the oil phase was much greater than that from the aqueous phase.It was quantitatively charified that a microorganism growing on hydrocarbon takes up the oxygen in the oil phase, which absorbs a considerable amount of oxygen from the gas phase directly, without passing through water.
公益社団法人日本生物工学会の論文
1977-01-25