Heat Removal in Penicillin Fermentation

Steps:

• Penicillin production uses aerobic fermentation, which is exothermic and generates excess heat.
• Uncontrolled heat rise harms microbial growth and antibiotic yield.
• Industrial fermenters include cooling structures like jackets or coils to dissipate heat.
• Labelled X functions as this cooling component to maintain optimal temperature.

Why D is correct:

• Fermentation heat must be removed to keep temperatures at 24–26°C, as per bioprocess engineering principles, preventing denaturation of penicillin-producing fungi.

Why the others are wrong:

• A: Isolation involves sterilization filters or airlocks, not a heat-related structure.
• B: Pressure is maintained by agitators and vents, unrelated to X.
• C: Temperature monitoring uses probes or sensors, not a structural remover.

Final answer: D