Figure 5.10 Effect of SRT on the performance of a CSTR receiving 1.0 L/hr of feed containing only 3100 mg/L as COD of biomass with an active fraction of 0.76. ("),/t = 10. Kinetic parameters and stoichiometric coefficients are listed in Table 5.2.

will require less oxygen because more of the electrons in the substrate will be retained in the biomass synthesized.

Seldom does a situation occur in which only one parameter changes. Usually all will change. For example, as discussed in Section 3.9, temperature can affect all of them and the response of the system will depend on how the changes interact. An example of this is presented in Figure 5.11, which shows the substrate concentration, biomass wastage and oxygen requirement for the situations listed in Table



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