| 摘要 |
PURPOSE:To improve production efficiency of yeast, by regulating properly a feed of a substrate during cultivation. CONSTITUTION:A seed mold is put in the culture tank 1, a substrate is fed from the substrate tank 7 by the pump M to the tank, datum from the measuring device 5 for oxygen partial pressure at the inlet, the measuring device 6 for an amount of gas at the inlet, the measuring device 11 for oxygen partial pressure of gas at the outlet, the measuring device 12 for partial pressure of carbonic acid gas, and the measuring device for an amount of exhaust gas are treated to calculate RQ, and a flow feed velocity of substrate (alpha value) is changed. Formation of by-product is detected, and when substrate flow is minimum or zero, the signal of dissolved oxygen sensor 9 is detected by the dissolved oxygen meter 10, alpha value is changed depending upon the change of it, to regulate the flow feed velocity of substrate. |
