Fig. 23.5. Predicted performance of a laboratory-scale rotating-drum bioreactor similar to that of Stuart et al. (1999). The parameters are as shown in Table 23.1 except that two different values of n were used, in order to simulate static (n = 1) and rotated fermentations

(n = 10). In the left hand column are the predicted temperatures of the (-) bed, (—□—)

headspace, and (—•—) bioreactor wall. In the right hand column are the various contributions to heat removal. Key: (-) rate of production of waste metabolic heat; (—•—) rate of heat removal to the bioreactor wall; (—□—) rate of heat removal by evaporation; (—+—) rate of heat removal by sensible energy transfer to the headspace gases

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