Nonthermal processes can be used for the inactivation of food-spoilage microorganisms without affecting the quality of the food. High pressure technology is gaining importance in the food industry because of the advantages of inactivating the microorganisms and enzymes and producing high quality foods .
Processing and equipment
The construction of high pressure machinery is a specialised and expensive operation .This is being adapted for use in the food industry and batch presses are available.The main components of a high pressure system are:
a pressure vessel and its closure
a pressure generation system
a temperature control device
a materials handling system.
Most pressure vessels are made from a high tensile steel alloy ‘monoblocs’ (forged from a single piece of material), which can withstand pressures of 400–600 MPa. For higher pressures, pre-stressed multi-layer or wire-wound vessels are used.
There are two methods of processing foods in high pressure vessels: in-container processing and bulk processing
Commercial Applications
using high-pressure treatment without the application of heat. The jams were vivid and natural in color and taste. In the United States and Europe, developments are being made in fruit products, ready meals, dairy products, meats, fish,and others. Several new industrial applications are expected soon.
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