Fermenter Temperature Control

Steps:

• Identify the outer water jacket as a structural feature surrounding the fermenter vessel.
• Recall that fermenters require stable conditions for microbial growth, like in Penicillium cultivation.
• Link the jacket's design to circulating water for heat exchange.
• Eliminate unrelated monitoring functions, confirming temperature regulation.

Why B is correct:

• The water jacket circulates heated or cooled water around the vessel, using principles of heat transfer to maintain optimal temperature for fermentation processes.

Why the others are wrong:

• A: Nutrients are added via the medium inside, not the jacket.
• C: Oxygen is monitored by dissolved oxygen probes, not the jacket.
• D: pH is measured by electrodes, not the jacket.

Final answer: B