GATE 2024 BT – Question 35

Fundamentals of Biological Engineering · Upstream Processing: Media formulation and optimization, sterilization of air and media · 1 mark · Numerical answer

The decimal reduction time of a microbe during sterilization at 120 $^o$C with a first order thermal death rate constant of 1 min$^{-1}$ will be ________ min (rounded off to 1 decimal place).

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Correct answer: 2.29 to 2.31

Explanation

$D = \frac{\ln 10}{k} = \frac{2.303}{1} = 2.3$ min.