915 MHz Single Mode Microwave Technology for Food Safety - from development to commercialization Key elements: vision, team/competence, passion/persistence, delivery/resources Juming Tang, Ph.D. Professor of Food Engineering Department of Biological Systems Engineering Washington State University, Pullman WA Microwaveheating.wsu.edu
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915 MHz Single Mode Microwave Technology for Food Safety - from development to commercialization Key elements: vision, team/competence, passion/persistence,
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915 MHz Single Mode Microwave Technology for Food Safety - from development to
Dr. Frank Liu, Project Engineer Computer simulation and experimental validation
Development of pilot-scale protocols
Dr.Frank Liu, Project engineer Engineering design and manufacturing
Measurement of food properties
29.5°C
91.6°C
40
60
80
AR01
WSU 2nd generation system - four single mode cavities, 40 kW max MW power, received FDA acceptance for first filing on Oct.
2009
Microwave assisted thermal processing system (MATS)
waveguide
cavity
0 phase shift
Change of Shear Force in Pink Salmon Fillet Heated at 121˚C
30
50
70
90
110
130
150
170
0 20 40 60 80 100 120 140
Cooking time (min)
Sh
ear
forc
e (N
)
Chicken and dumplings in 8 oz pouches (Print-pack) processed
with WSU Microwave Sterilization System, produced for sensory studies at US Army
Natick Soldier Center
• Chicken and dumplings in 8 oz foil pouches by retort (control) for the sensory
studies
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On Oct. 7, 2009, we received first FDA approval
Visiting FDA Low Acid Food Team in DC, 2004
First FDA filing: mashed potato in 10 oz trays -2008
Engineers conducting heat distribution and heat penetration studies
NFPA strain 3679 (P.A.. 3679) as the surrogate.
D121C should be 3-4 times that of C. botulinum spores, so that we use smaller number of surrogate to validate 12 log reduction in C. botulinum spore populations
Microbial validation of food safetyTargeted microorganism – C. botulinum spores
Prepare samples for inoculated pack studies with PA 3679 spores
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On Oct. 7, 2009, we received first FDA approval
Second FDA filing: salmon fillets in sauce in 8 oz pouches - 2009
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Salmon filet, skinless and boneless
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8-oz Printpack pouch
Developing data to seek FDA approval for non-homogeneous foods
• Positioning Ellab sensor tip at the
location determined by heating pattern
Processing real food in MW system
• Data retrieval from Ellab temperature sensor
• Temperature profile overlay with MW system data
Inoculating PA 3679 spores to the cold spot in salmon fillets
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Incubation in Walk-in Incubator (~ 36°C)
• Positive pouches
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Process accepted on Dec. 15, 2010
Submitter: Kenneth Lum
PINK SALMON, SKINLESS AND BONELESS IN ALFREDO SAUCE
(processing method) MICROWAVE ASSISTED HEATING
(finished pH) 6.3
(sterilizer) OTHER SEE COMMENTS; Microwave Assisted
Prototype
(heating medium) WATER IMMERSION
(process source)
Source Attached Document
09/22/2010 -- LETTERSCSI, subsidiary of Seafood Products
Association, formerly NFPA NW Laboratory
Process Source -- MW Filing Rec 9-22-10SG.pdfNotes: Process Recommendation letter
Summary of Major Milestones• July, 01 Formed WSU Microwave Consortium I• July, 02 Developed first 915 MHz single mode pilot
system (10 kW)• Oct., 06 Received US patent for 915 MHz single
mode microwave sterilization system design • Aug.,07 Developed a second generation
system – semi-continuous system (40 kW)• Oct., 09 Received FDA acceptance for MW
sterilization of mashed potato in 10 oz trays• Nov. 10 Formed MW Consortium II, focusing on
commercialization• Dec. 10 Received FDA acceptance for MW
sterilization of salmon fillets in sauce in 8 oz pouches
• 2011 Filed petition to USDA FSIS for processing foods containing >2% egg, poultry and meats
WSU licensed exclusive rights for commercialization of this technology to Food Safety Chain (FSC) corporation (Maple Valley, WA). Formed MW Consortium II (Nov. 11, 2010).