X ray & Infrared Food Preservation Technology
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X ray & Infrared Food Preservation Technology
- 1. 1 FST 1424
- 2. 2 FST 1424 This is Supun
- 3. 3 FST 1424
- 5. 5 FST 1424
- 6. 6 FST 1424
- 7. 7 FST 1424
- 9. 9 FST 1424 Analysis Results Infrared Food Preserving Pulse X ray Package Sterilizing Prof Dexter (WUSL)
- 10. 10 FST 1424
- 11. 11 FST 1424 Wave Length 30cm -740nm Temperature above 5K emit IR Infrared? What is Frequency 3GHz up to about 400THz Comparatively Low frequency High wavelength to X rays
- 12. 12 FST 1424 Infrared? Classification 0.75-1.4 μm 1.4 – 3 μm 3 - 1000 μm Industrially IR Emitters are designed according to these categories.
- 13. 13 FST 1424 Mode of Action Infrared Causes vibration and rotation of molecules Absorb E Heat H20 Most Affected Other molecules Protiens , Lipids, CHO with polar groups (-NH, -CO, -OH, C=C) DNA and RNA can be damaged/ Ribosomes/Cell envelop/ proteins
- 14. 14 FST 1424 Inactivation Depends? • IR power level • Temperature of food sample • Peak wave length • Type of Micro organism • Affect of moisture content • Depth of food item
- 15. 15 FST 1424 Technological Applications Infrared IR Dry Blanching IR Drying & Dehydration Combined IR & Hot Air Drying Combined IR & Freeze Drying IR Baking IR Peeling Roasting Sterilization Pasterization
- 16. 16 FST 1424 Technological Applications Infrared Drying • Fruits • Vegetables • Fish • Pasta Baking • Pizza • Bread • Biscuit Roasting, Pasteurization, Sterilization • Coffee • Cacao • Cereals & Nuts • Meat
- 17. 17 FST 1424 Pros? IR Uniformity heating High quality dry food production Low cost Quick method Loss of solids is low Portability Safe Non toxic ,no harmful side effects to human or environment Surface colour development
- 18. 18 FST 1424 Cons? IR Low penetration power Eye & Skin hazards Limited applications in liquids Hurdles are needed Less consumer awareness
- 19. 19 FST 1424 Higher energy 100eV – 100KeV Short Wave Length (0.01 - 10 nm) Bremssthrahlung X-rays X Rays? What are High Frequency 3 x 1016 – 3 x 1019 Hz Comparatively High frequency Low wavelength to IR
- 20. 20 FST 1424 X ray • A pulse of high intensity • Pulses in gigawatt range • Opening time 30ns to few ns
- 21. 21 FST 1424 X Rays Produced? How
- 22. 22 FST 1424 X Rays Effective? WHY
- 23. 23 FST 1424 Mold Potato Sprouts Salmonella Spp. In Fully Packaged Form All destroyed by X ray
- 24. 24 FST 1424 Mode of Action Direct Indirect As a result of energy deposition by the radiation on the target molecule Reactive diffusible free radicals formed from the radiolysis of water OH- , eaq -, H202
- 25. 25 FST 1424 *Overall Similar to other radiation but difference makes with pulsing and how it generates High penetrating power Switch on–switch off capability No Radio active residues High throughput Pros Pulse X Rays
- 26. 26 FST 1424 Technically complex Low Consumer Acceptability No more than 7.5 Mev used Only used to PACKAGED Food Cons Pulse X Rays
- 28. 28 FST 1424 “Many studies have shown that ions, excited atoms and molecules generated during irradiation have no toxic effect on humans.” -FDA
- 29. 29 FST 1424 Thank You ! Any Questions?