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Which of the following cannot be sterilized by steam?

(a) Air

(b) Water

(c) Fermenter vessels

(d) Fermentation media

This question was posed to me in an online interview.

This interesting question is from Filter Sterilization in chapter Sterilization of Fermentation Technology

1 Answer

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Best answer
Correct option is (a) Air

The explanation: Air cannot be sterilized by steam. It can be sterilized by heat, filtration, UV radiation, gas scrubbing. The sterilization by heat and filtration the most common method used for air sterilization.

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