Dissolved oxygen concentration and cell concentration profiles. The variations in dissolved oxygen concentration with the
cultivation time and agitation rate are given in Fig. 7. At LOT,
CDO decreased within t = 0–3 h to 0.009 mmol dm−3 , and did not
increase even when the microorganism reached the stationary
growth phase. Whereas at HOT, CDO decreased throughout the process; but the decrease rate was much lower compared to LOT and
MOT.