General References

Adapted from Canned Foods—Principles of Thermal Process Control, Acidification and Container Closure Evaluation, 6th ed., The Food Processors Institute, Washington, D.C., 1995.

K. Stevenson

D. Chandarana

National Food Processors Association

Dublin, California

ASEPTIC PROCESSING: OHMIC HEATING

The recent development of the ohmic heater represents a major advance in the continuous processing of particulate food products. The ohmic heater uses resistance heating within the flow of electrically conducting liquid and particulates to provide heat and is capable of handling food products containing particulates of up to 25 mm.

When combined with an aseptic container or bag-in-box filling system, this new process offers the food processor with the possibility of producing high-quality, ready-prepared meals containing large quantities of undamaged chunks of meat and vegetables, which can be stored at ambient temperatures for long periods of time. The process has also been successfully applied to the sterilization of diced and sliced fruit at solids concentrations of up to 80% drained weight.

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