Determine the F value for a 12 D process for Clostridium botulinum at 250 oF, based on the following data. After heating for 3 minutes at 250 oF, the microbial count was reduced from 105 count/mL to 102 counts/mL (3 log reduction).
F =12D
F value is the time required to kill a given microbial population at a specified temperature. It is a multiple of D value
D value is the decimal reduction time. It is the time required to reduce bacterial population by one log cycle.
Here the microbial population is reduced from 105 count/mL to 102 counts/mL ( 3 log cycles) in 3 minutes
3 minutes 3 log cycle
1 minute 1 log cycle
So the D value is 1 minute at 250 o F.
F =12D
F =12 x 1 =12 minutes
Determine the F value for a 12 D process for Clostridium botulinum at 250 oF, based...
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