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Establishing the Heat-Preservation Process For Aseptically-Packaged Low-Acid Food Containing Large Particulates,
I J Pflug1, M R Berry1, D M Dignan1
1Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108; Environmental Monitoring Systems Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH 45268 (Formerly with Division of Food Chemistry and Technology, U.S. Food and Drug Administration, Cincinnati, OH 45226); Division of Food Chemistry and Technology, U.S. Food and Drug Administration, Washington, DC 20204.
Abstract:
"Aseptic" is the shorthand name for the food production system where product moves in continuous flow through a heat-hold-cool thermal process and is then filled into a sterile package. The package is sterilized, filled, and sealed in a sterile environment. Today, both acid and low-acid homogeneous liquid foods are produced by aseptic systems; low-acid foods that contain particulates in a liquid vehicle may be produced soon. The principles for establishing a heat preservation process for low-acid foods that contain particles larger than 5 mm in diameter and are to be sterilized continuously in a heat-hold-cool system are described. Only product sterilization, which is just one part of the aseptic system, is addressed. The term "heat-hold-cool" identifies the system used to achieve microbial control of the product.
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