The biomass reactionis carried out in a 6 dm3 chemostat with a heat exchanger.The volumetr...

The biomass reaction

is carried out in a 6 dm3 chemostat with a heat exchanger.

The volumetric flow rate is 1 dm-Vh, the entering substrate concentration and temperature are 100 g/dm3 and 280 K, respectively. The temperature dependence of the growth rate follows that given by Aibe et al., Equation (7–63)

And

Plot G(T) and R(T) for both adiabatic and non-adiabatic operation assuming a very large coolant rate (i.e., Q = UA (Ta- 7) with A = 1.1 m2 and Ta = 290 K). See Chapter 8 Summary Notes on the Web site for a hint.

What is the heat exchanger area that should be used to maximize the exiting cell concentration for an entering temperature of 288 K? Cooling water is available at 290 K and up to a maximum flow rate of 1 kg/minute.

Identify any multiple steady states and discuss them in light of what you learned in this chapter. Hint: Plot Ts vs. T0 from part (a).

Vary Ta, mc, and Ta and describe what you find.

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