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Using the Straight-Line Semilogarithmic Microbial Destruction Model as an Engineering Design Model for Determining
1Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Avenue, St. Paul, Minnesota 55108.
Abstract:
The objective of this review paper is to support the use of the semilogarithmic microbial destruction model as a tool for arriving at an appropriate heat process FT-value. Both "science" and "engineering" are important in preserving food; however, the actual heat processing of the food product is an engineering operation and requires an engineering approach. The characteristics of an engineering design model are discussed and are contrasted with the requirement of a model to fit scientific data. A case is made for the use of the simple semilogarithmic model as an engineering design model for determining the heat process FT-value. An example is presented regarding how the model can be used to understand the effect of a change in product initial microbial load on the number of observed failures.
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