08-FoodProcessing

08-FoodProcessing - 1 next to ^ Hunters & Gathers How...

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Unformatted text preview: 1 next to ^ Hunters & Gathers How to prevent microbial growth. High Temperature thermal death Low Temperature low (refrigeration) or very low (frozen) Remove Moisture dry - dehydration Control H 2 O availability add sugar or salts pH Control add acid - lower pH Oxygen add or restrict - aerobic or anaerobic Beyond Canned Foods: Examples of Advanced Processing Aseptic Processing Ohmic Heating Irradiation High Pressure Processing Pulsed Electric Field High Intensity Pulsed Light In conjunction with: Membrane Filtration Ozonation Food preservation technologies must render products free of pathogenic microorganisms. 2 The idea of forming, filling and sealing packaging from a paper tube has been attributed to Ruben Rausing. This means that the whole process could take place without interruption, if the paper web is continuously formed into a cylinder. Ruben Rausing has himself recounted how the question found its solution: One day at lunch at home I was talking with my wife about this. Suddenly she said Why don t you continuously fill milk into the tube (...) and then seal it through the milk? . After the first invention in 1944 it took nearly 10 years until a feasible material could be produced on a large scale. Ruben Rausing summarized the extent of the problem: Doing something that nobody else has done before is actually quite hard. Before his death in 1983 , Ruben Rausing was Sweden's richest person Aseptic Packaging Paper provides stiffness, strength and the efficient brick shape to the package. Polyethylene on the innermost layer forms the seals that make the package liquid-tight. A protective coating on the exterior keeps the package dry and provides a unique printing surface for nutritional information and graphic design. Aluminum forms a barrier against light and oxygen. This ultra-thin layer of foil eliminates the need for refrigeration and prevents spoilage without using preservatives. The aseptic packaging process has been named "the most significant food science innovation of the last 50 years," by the Institute of Food Technologists 3 Tight container Sterile surrounding during packaging Packaging material sterilization Aseptic transfer Product sterilization Aseptic Processing The cold filling a commercially sterilized food into a pre-sterilized package and hermetically sealed in a sterile environment. Aseptic means sterile or free of bacterial contamination. Aseptic is commonly used to describe food processing and packaging techniques for non-refrigerated storage or long-life products Canning & Aseptic Processing Most shelf-stable food is usually canned. It is cooked twice during the canning process....
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This note was uploaded on 03/18/2012 for the course FST 10 taught by Professor Jack during the Spring '08 term at UC Davis.

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08-FoodProcessing - 1 next to ^ Hunters & Gathers How...

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