When the filtered effluent stream is cell free then h = 0 and A = c. However, if the filter removes very little biomass then h will approach 1, and when h = j there is no feedback and A = h. Thus, the range 0f values of A is c to h and when feedback occurs A js: less than 1, which means that /x is less than D.
The concentration of the growth limiting substrate in the vessel at steady state is then given by:
and the biomass concentration at steady state is given by:
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