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Question 48

An industrial fermenter is used to grow microorganisms under controlled conditions to produce useful substances on a large scale.

a.

Explain why the temperature within the fermenter must be kept tightly regulated around an optimum level.

[3]
b.

State two design features of an industrial fermenter that are used to monitor and maintain this optimal temperature.

[2]
c.

An agitator (paddles or stirrer) is continuously operated inside the fermenter. Suggest two reasons why agitation is necessary to achieve a high yield of the product.

[3]
d.

Before starting a new fermentation culture, superheated steam is blown through the empty fermenter. Explain the importance of this cleaning process before inoculation.

[3]

Food production Questions

  1. IGCSE
  2. /Biology
  3. /Food production