イタコン酸醗酵に関する研究 : (第6報) Asp. terreus K 26 によるイタコン酸醗酵における酸素移動速度におよぼす菌体濃度の影響(生物化学工学特集号-II 滅菌および培養工学)

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The measurement of the oxygen transfer capacity coefficient, K_d was undertaken using two different methods. One of them was a sulfite oxidation method using sterilized mycelium. Another was a gas analysis method using fermenting broth.The fermentor used for this experiment was Waldhof type as shown in Fig. 1 and the results of the findings given in Table 1.The effects of K_d on the specific rate of itaconic acid production using Asp. terreus K 26 are shown in Fig. 2.The rate equation for this relation in connection with the term of K_d was found to be expressed by the following empirical equation V_i=1.585×10^5×K_d^0.86 (0.8&glt;1.6,K_d⪯6.4×10^<-6>cm)where V_i means mass velocity of the acid produced and K_d means oxygen transfer capacity coefficient.The relation between K_d and agitator speed is shown in Table 1 and Fig. 3. The effects of C.S.L. and of mycelium concentration on apparent specific gravity of liquid are shown in Fig. 5.The relation between K_d and partial pressure of oxygen is shown in Fig. 4. The influence of the addition of organic substances, such as C.S.L., to the test liquor on the value of K_d is shown in Table 2.It is of value to note that the changes of the K_d values resulting from the addition of organic substances to the test liquors (given in Table 2.) are determined by the change in the apparent specific gravity of liquid because of air retention.
社団法人日本生物工学会の論文
1965-08-25