Abstract
Discussions were made on the effects of oxygen supply at the growth phase and the production phase in glutamic acid fermentation. The following points were clarified:
(1) In the production phase, deficiency of oxygen supply resulted in the less product formation and high aeration did not exert harmful effects.
(2) In the growth phase, deficiency of oxygen supply scarcely resulted in the less product formation if sufficient aeration was attained at the subsequent production phase and high aeration yielded the cells which were practically incapable of forming glutamate under any aeration conditions at the produc-tion phase.
(3) From these findings, the existence of the optimum condition of aeration in glutamic acid fermentation was explained.
