Thus, in some continuous flow process embodiments, the methods of the present invention comprise the steps of (a1) centrifuging a microorganism-containing suspension to produce a first microorganism-containing concentrate and a supernatant liquid; (a2) continuously withdraWing the first microorganism-containing concentrate during centrifugation; and (b) filtering the first microorganism-containing concentrate to produce a permeate and a second microorganism-containing concentrate. In some embodiments, the centrifugation step is directly folloWed by the filtration step.
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