In this research we analyse the steady-state operation of a continuous flow bioreactor, with a recycle factor. The reaction is assumed to be governed by the well-known Monod growth kinetics. The steady-states of the recycle model are found and their stability determined as a function of the residence time. This is quantified for the case of an ideal membrane reactor. We then look at a model with the addition of predators to the system to see if they reduce the amount of total suspended solids in the reactor. Through varying the parameter for the growth rate of predators, we try to optimise the use of the predators in the continuous flow bioreactor.