Oxygen Absorption Rate in an Aerated Stirred Tank under Increasing Pressure : Studies on Fermentation under Increasing Pressure (I)

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The oxygen absorption rate in an aerated stirred tank was measured under pressures up to 5.9 atm by the sulfite oxidation method to elucidate the effect on it of pressure.With an air supply of constant mass velocity, the oxygen absorption rate increased proportionally to the 0.4〜0.8th power of the pressure, P, while the volumetric oxygen transfer coefficient decreased with the increase in pressure. With an air supply of constant superficial velocity, however, the rate of oxygen absorption increased proportionally to the 1.1th power of the pressure, and the volumetric oxygen transfer coefficient increased in proportion to P^<0.1>. The following empirical equation was proposed for the volumetric oxygen transfer coefficient (K_d) to take the effect of pressure into consideration;K_d=2.8×10^<-8>(P^<0.1>)(u_<GP>^<0.85>)(N^<1.8>)where u_<GP> is superficial air velocity and N is impeller rotational speed.
公益社団法人日本生物工学会の論文
1981-06-25