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The Zymomonas mobilis cells are used for chemostat culture in a 60 m3 fermenter. The feed contains 12 g l-1 glucose; Ks for the organism is 0.2 g l-1. What flow rate is required for a steady-state substrate concentration of 1.5 g l-1?

The Zymomonas mobilis cells are used for chemostat culture in a 60 m3 fermenter. The feed contains 12 g l-1 glucose; Ks for the organism is 0.2 g l-1. What flow rate is required for a steady-state substrate concentration of 1.5 g l-1? Correct Answer 15.6 m3 h-1

Yxs = 0.06 g g-1; Ypx = 7.7 g g-1;μmax = 0.3 h-1; Ks = 0.2 g-1; ms = 2.2 g g-1 h-l; si = 12 g 1-1; V=60 m3. qp = 3.4 h-1, YPS = Ypx Yxs = 0.46 g g-1. s = 1.5 g l-1

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