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OBJECTIVES
1. Other alternative methods for food treatment;
2. Applications;
3. Benefits and changes of foodstuffs.
FOOD IRRADIATION
1ALTERNATIVE METHODS FOR FOOD TREATMENT
1. Ultrasound treatment - sonication
Sound frequency ranges
2ALTERNATIVE METHODS FOR FOOD TREATMENT
1. Ultrasound treatment (sonication) - principle
Sound propagation in a liquid showing cavitation bubble formation and collapse
!
3ALTERNATIVE METHODS FOR FOOD TREATMENT
1. Ultrasound treatment (sonication) - equipment
Simplest – ultrasonic baths Ultrasonic probe system
4
1. Ultrasound treatment (sonication) - mechanism
ALTERNATIVE METHODS FOR FOOD TREATMENT
5
Ultrasound in the food industry
The food industry as well as the pharmaceutical industry offer manifold possibilities
for the use of sonication. Ultrasonic processors are used in food manufacturing for:
• disintegration of cells
• extracting (extract intracellular components or obtain cell-free bacterial enzyme)
• activation (acceleration) of an enzyme reaction in liquid foods
• acceleration of fermentation
• mixing and homogenizing
• dispersion of a dry powder in a liquid
• emulsifying of oil/fat in a liquid stream
• spraying
• degassing
• inspection, e.g. in the beverage industry
• deactivation of enzymes
• microbial inactivation (preservation)
• crystallization
• meat processing
• stimulation of living cells
• enhanced oxidation
ALTERNATIVE METHODS FOR FOOD TREATMENT
1. Ultrasound treatment (sonication) – food applications
!
6
1. Ultrasound treatment (sonication) – non-food applications
ALTERNATIVE METHODS FOR FOOD TREATMENT
7
2. Treatment with high pressure –
High hydrostatic pressure (HHP) or Hydrodynamic pressure processing (HDP)
http://www.hiperbaric.com/en/hpp
ALTERNATIVE METHODS FOR FOOD TREATMENT
The effect of high pressure processing on food systems was first reported by Hite
(Hite BH. 1899. The effect of pressure in the preservation of milk. Bull West
Virginia Univ Agric Exp Stn 58:15–35.). However, few studies were published until
the 1970s because of technical difficulties and costs associated with HHP
processing units and packaging materials. HHP treatment – 100÷1000 MPa.
1). A.M.Williams-Campbell, Morse Solomon, Reduction of spoilage microorganisms in fresh beef using
hydrodynamic pressure processing, 65(3), 2002, 571-574, Journal of food protection.
3). Williams-Campbell, A.M., Solomon, M.B. New non-thermal postharvest technology to improve food safety:
hydrodynamic pressure processing. The International Society for Optical Engineering (SPIE).
2000. v. 4206. p. 167-173.
http://freshpress.gr/index.cfm?action=video&lang=EN
shockwave treatment
7
2. Treatment with high pressure –
High hydrostatic pressure (HHP) or Hydrodynamic pressure processing (HDP)
ALTERNATIVE METHODS FOR FOOD TREATMENT
3). Williams-Campbell, A.M., Solomon, M.B. New non-thermal postharvest technology to improve food safety:
hydrodynamic pressure processing. The International Society for Optical Engineering (SPIE).
2000. v. 4206. p. 167-173.
Comparative scheme of the high pressure technologies and the pressures utilized. MF:
microfluidization; HPH: high pressure homogenization; HPJ: high pressure jet
processing; HPP – high pressure processing
7
2. Treatment with high pressure –
High hydrostatic pressure (HHP) or Hydrodynamic pressure processing (HDP)
ALTERNATIVE METHODS FOR FOOD TREATMENT
3). Williams-Campbell, A.M., Solomon, M.B. New non-thermal postharvest technology to improve food safety:
hydrodynamic pressure processing. The International Society for Optical Engineering (SPIE).
2000. v. 4206. p. 167-173.
8
3. Pulsed electric field (PEF) treatment
ALTERNATIVE METHODS FOR FOOD TREATMENT
5-80 kV/cm generated by the application of short high voltage pulses (µs) between two electrodes
$450,000 to $2,000,000
https://www.youtube.com/watch?v=uSK-7dqaVLo
9
3. Pulsed electric field (PEF) treatment
Features of co-linear PEF treatment chambers. Top: sectional view of the electrode configuration and
the resulting electrical field. The central high voltage electrode is separated from two grounded
electrodes on either side by an electrical insulator. One example is given which shows the field strength
along the central axis at the treatment zone A–B. 5-100кV/cm
ALTERNATIVE METHODS FOR FOOD TREATMENT
Pulsed Electric Fields for Food Processing Technology, M.E.A. Mohamed, A.H.A. Eissa in “Structure and
Function of Food Engineering” (Ed. Ayman Amer Eissa), 2012, publisehd by InTech (DOI: 10.5772/1615)
10
4. Pulsed Light Technology
ALTERNATIVE METHODS FOR FOOD TREATMENT
https://www.youtube.com/watch?v=AQ4BY93Ot8A
http://courses.washington.edu/eh451/articles/Pulsed-Light-Food.pdf
10
5. Cold Plasma treatment
ALTERNATIVE METHODS FOR FOOD TREATMENT
https://www.youtube.com/watch?v=HF3wVOfBVuQ
10
6. Dense Phase CO2 treatment
ALTERNATIVE METHODS FOR FOOD TREATMENT
https://www.slideshare.net/mayasharma9026/maya-sharma-presentation

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FOOD IRRADIATION

  • 1. OBJECTIVES 1. Other alternative methods for food treatment; 2. Applications; 3. Benefits and changes of foodstuffs. FOOD IRRADIATION
  • 2. 1ALTERNATIVE METHODS FOR FOOD TREATMENT 1. Ultrasound treatment - sonication Sound frequency ranges
  • 3. 2ALTERNATIVE METHODS FOR FOOD TREATMENT 1. Ultrasound treatment (sonication) - principle Sound propagation in a liquid showing cavitation bubble formation and collapse !
  • 4. 3ALTERNATIVE METHODS FOR FOOD TREATMENT 1. Ultrasound treatment (sonication) - equipment Simplest – ultrasonic baths Ultrasonic probe system
  • 5. 4 1. Ultrasound treatment (sonication) - mechanism ALTERNATIVE METHODS FOR FOOD TREATMENT
  • 6. 5 Ultrasound in the food industry The food industry as well as the pharmaceutical industry offer manifold possibilities for the use of sonication. Ultrasonic processors are used in food manufacturing for: • disintegration of cells • extracting (extract intracellular components or obtain cell-free bacterial enzyme) • activation (acceleration) of an enzyme reaction in liquid foods • acceleration of fermentation • mixing and homogenizing • dispersion of a dry powder in a liquid • emulsifying of oil/fat in a liquid stream • spraying • degassing • inspection, e.g. in the beverage industry • deactivation of enzymes • microbial inactivation (preservation) • crystallization • meat processing • stimulation of living cells • enhanced oxidation ALTERNATIVE METHODS FOR FOOD TREATMENT 1. Ultrasound treatment (sonication) – food applications !
  • 7. 6 1. Ultrasound treatment (sonication) – non-food applications ALTERNATIVE METHODS FOR FOOD TREATMENT
  • 8. 7 2. Treatment with high pressure – High hydrostatic pressure (HHP) or Hydrodynamic pressure processing (HDP) http://www.hiperbaric.com/en/hpp ALTERNATIVE METHODS FOR FOOD TREATMENT The effect of high pressure processing on food systems was first reported by Hite (Hite BH. 1899. The effect of pressure in the preservation of milk. Bull West Virginia Univ Agric Exp Stn 58:15–35.). However, few studies were published until the 1970s because of technical difficulties and costs associated with HHP processing units and packaging materials. HHP treatment – 100÷1000 MPa. 1). A.M.Williams-Campbell, Morse Solomon, Reduction of spoilage microorganisms in fresh beef using hydrodynamic pressure processing, 65(3), 2002, 571-574, Journal of food protection. 3). Williams-Campbell, A.M., Solomon, M.B. New non-thermal postharvest technology to improve food safety: hydrodynamic pressure processing. The International Society for Optical Engineering (SPIE). 2000. v. 4206. p. 167-173. http://freshpress.gr/index.cfm?action=video&lang=EN shockwave treatment
  • 9. 7 2. Treatment with high pressure – High hydrostatic pressure (HHP) or Hydrodynamic pressure processing (HDP) ALTERNATIVE METHODS FOR FOOD TREATMENT 3). Williams-Campbell, A.M., Solomon, M.B. New non-thermal postharvest technology to improve food safety: hydrodynamic pressure processing. The International Society for Optical Engineering (SPIE). 2000. v. 4206. p. 167-173. Comparative scheme of the high pressure technologies and the pressures utilized. MF: microfluidization; HPH: high pressure homogenization; HPJ: high pressure jet processing; HPP – high pressure processing
  • 10. 7 2. Treatment with high pressure – High hydrostatic pressure (HHP) or Hydrodynamic pressure processing (HDP) ALTERNATIVE METHODS FOR FOOD TREATMENT 3). Williams-Campbell, A.M., Solomon, M.B. New non-thermal postharvest technology to improve food safety: hydrodynamic pressure processing. The International Society for Optical Engineering (SPIE). 2000. v. 4206. p. 167-173.
  • 11. 8 3. Pulsed electric field (PEF) treatment ALTERNATIVE METHODS FOR FOOD TREATMENT 5-80 kV/cm generated by the application of short high voltage pulses (µs) between two electrodes $450,000 to $2,000,000 https://www.youtube.com/watch?v=uSK-7dqaVLo
  • 12. 9 3. Pulsed electric field (PEF) treatment Features of co-linear PEF treatment chambers. Top: sectional view of the electrode configuration and the resulting electrical field. The central high voltage electrode is separated from two grounded electrodes on either side by an electrical insulator. One example is given which shows the field strength along the central axis at the treatment zone A–B. 5-100кV/cm ALTERNATIVE METHODS FOR FOOD TREATMENT Pulsed Electric Fields for Food Processing Technology, M.E.A. Mohamed, A.H.A. Eissa in “Structure and Function of Food Engineering” (Ed. Ayman Amer Eissa), 2012, publisehd by InTech (DOI: 10.5772/1615)
  • 13. 10 4. Pulsed Light Technology ALTERNATIVE METHODS FOR FOOD TREATMENT https://www.youtube.com/watch?v=AQ4BY93Ot8A http://courses.washington.edu/eh451/articles/Pulsed-Light-Food.pdf
  • 14. 10 5. Cold Plasma treatment ALTERNATIVE METHODS FOR FOOD TREATMENT https://www.youtube.com/watch?v=HF3wVOfBVuQ
  • 15. 10 6. Dense Phase CO2 treatment ALTERNATIVE METHODS FOR FOOD TREATMENT https://www.slideshare.net/mayasharma9026/maya-sharma-presentation