Reactions and reactors - Reactions in food products

5 important questions on Reactions and reactors - Reactions in food products

What is the order of reaction of both inactivation of enzymes and inactivation of micro-organisms?

1st order.

What is the D-value and the D0?


D: The time it takes for the microbial count to be reduced a factor of 10.
D0: The standard decimal reduction time. At 121 degrees Celsius.

What is the difference between the lethality and the thermal death time?

Lethality is the integral over the whole heating time and the thermal death time is the equivalent inactivation with a certain duration. Almost always at a certain temperature.
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What is the typical Z-value? (as a rule of thumb)

10 degrees Celsius.

If rN (N is the final microbial population in one container) = 1, what is the new equation for the F/D needed?

Log10(rN0) = F / D

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