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Statement for Linked Answer Questions 54 and 55:B-Galactosidase bound to DEAE-cellulose is used to hydrolyze lactose to glucose and galactose in a plugow bioreactor mm a packed bed of volume 100 liters and a voidage (e) of 0.55. The Km and V'm; for theimmobilized enzyme are 0.72 g1'1 and 18 gl'lh'l, respectively. The lactose concentration in the eld streamis 20 gl'l, and a fractional conversion of 0.90 is desired. Diffusional limitations may be ignored.Q54 The residence time required for the steady state reactor operation will be

  1. 0.1 h
  2. 0.4 h
  3. 1.0 h
  4. 1.1 h
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