Comparison of Batch and CSTF

As discussed earlier, the residence time required for a batch or steady-state PFF to reach a certain level of cell concentration is 

On the other hand, the residence time for the CSTF is expressed as Eq. (6.28) which is equal to the area of the rectangle of width Cx - Cx. and height 1 /rx. 

Since the 1 /rx versus Cx curve is U shaped, we can make the following conclusions for single fermenter. 

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