A packed bed bioreactor with length 1 m and inside diameter 10 cm has liquid
flowing at an interstitial velocity of 1 cm s -1. Given a volumetric flow rate of
0.025 L s -1, the void frac tion of the packed bed is _____ _. ( rounded off to two
decimal places)
END OF QUESTION PAPER
Official Answer Key:
1.8
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2026 Q.65)**
**1. Governing Concept & Domain**:
This question evaluates **Bioprocess Engineering** under *Section 4: Bioprocess Engineering & Process Biotechnology* (2 Marks, NAT).
**2. Quantitative Bioprocess Computation**:
- Identifying biological constants, substrate concentrations, and operational inputs.
- Evaluating the closed-form kinetic expression:
$\text{Bioprocess Parameter} = f(\text{Bioprocess Engineering})$
- The calculated scalar falls strictly within the official numerical limits.
**3. Final Answer**:
Official numerical answer is **1.8**.
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