20 40 Time (h)

Fig. 24.4. (a) Predicted temperatures within the bed for a bioreactor in which the inlet air temperature (bottom-most line) is reduced in response to the temperature at the bed outlet (topmost line) according to Eq. (24.1). The other operating conditions are as in Table 24.1. Each curve represents the temperature profile against time at a particular location in the bioreactor. Moving upwards, the curves are for greater and greater heights in the bed. (b) Predicted growth profiles at different regions in the bed. Compared with Fig. 24.3, the average growth rate in the bed is much closer to the maximum possible rate o

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