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Fig. 25.6. Improvement of the predicted performance of a 1 m high bioreactor in which the air flux is maintained at 0.1 kg-dry-air m-2 s-1. The parameters for each simulation are as given in Tables 25.1, 25.2, and 25.3. (a) Solids temperatures and (b) water activities when the outlet gas relative humidity set point is changed to 0.95; (c) Solids temperatures and (d) water activities when the outlet gas relative humidity set point is 0.95 and the inlet air humidity is 0.75; (e) Solids temperatures and (f) water activities when the outlet gas relative humidity set point is 0.95, the inlet air humidity is 0.99, and the inlet air temperature is 35°C; (g) Solids temperatures and (h) water activities when the outlet gas relative humidity set point is 0.95, the inlet air humidity is 0.99, and the inlet air temperature is 33°C. Key to graphs (a) to (h): Fractional heights of (-) 0.025; (—A—) 0.5; (—■—) 1.0. The horizontal lines represent temperatures and water activities that give fractional specific growth rates of (- - -) 0.9 and (■■■■) 0.8

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