This
simulation illustrates how to start and control a chemostat.
The process variables are here plotted against time, while the
simulation with chemostat_ss shows the variables plotted
against dilution rate (D)
Upper
graph: The 10 L process was started as a batch with 15 g/L
limiting S. When this substrate was consumed after about 7 hrs
(seen from the rapid increase in DOT) the chemostat process was
started with a medium containing Si=15 g/L and with the flow
rate F=2 L/h, which gives D=0.2 h-1.
The time scale of the
simulation was automatically changed to 0-150 hrs at time 19
hrs without interruption of simulation.
Lower panel: At 30 hrs
F was increased to 3 L/h. Check the effects on the state
variables! At 64 hrs Si was increased from 15 to 20 g/L. Check
the effects on the state variables! At 100 hrs the flow rate F
was increased to 8 L/h. What happened and why?
Note
that the model can not handle oxygen limitation. The model
assumes obligately aerobic metabolism.
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