1

Fig. 13.2. The consequences, for model complexity, of a desire to model the spatial distribution of biomass at the microscale

Branch angle?

Velocity of tip ^ extension?

Fig. 13.2. The consequences, for model complexity, of a desire to model the spatial distribution of biomass at the microscale

13.2.3 Typical Features of the Kinetic Sub-models

As a result of the considerations above, the kinetic sub-models of SSF bioreactors often (although not always) are simple empirical equations and do not describe the spatial distribution of the biomass. Further, due to the difficulties of measuring biomass and metabolic states within SSF systems, many kinetic sub-models within SSF bioreactor models are "unstructured" and "non-segregated". Unstructured models do not describe any intracellular events, while unsegregated models do not divide the biomass into different subpopulations. The simple kinetic equations that result from these decisions will be explored in Chaps. 14 to 17.

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