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Testing of Photocatalytic Technologies for Use on Food Surfaces: Use of Natural Products as Photocatalytic Agents
1. ADVANCING CANADIAN AGRICULTURE AND AGRI-FOOD
PROJECT # AB0159CO
‘‘Testing of Photocatalytic
Technologies for Use on Food Surfaces:
Use of Natural Products as
Photocatalytic Agents’’
Nick D. Allan, M.Sc.
Contract Research Manager
3. The Problem
The Need for Hard/Food Surface
Sanitizers
CFIA’s food safety yearly spending is CAD$360M1
The National Cattlemen’s Beef Association
estimates $1B in beef sales are lost each year in
the United States to spoilage1
The Canadian Cattleman’s Association estimates
that $ 200M in sales are lost each year2.
1)Food safety Report of the US Government Accountability Office, 2005
2)The Cattlemen’s news Letter. Vol. 6, 2005.
4. The Problem
Barriers to Developing a Good Hard
Surface Sanitizer
Effectiveness
Biofilms (ACAAF project # AB00008)
Concentration
Interference/Inactivation by environment
Duration of Efficacy
Human/Food Safety
8. Project Overview:
The Development of Sani-LuxTM
PHASE I: Food Dye Screening
Physical Properties
Biological activities
PHASE II: Hard Surface and Food Surface
Screening (Practical Testing)
PHASE III: Filing as a Sanitizer with CFIA
9. PHASE I:
Food Dye Screening
Evaluation of Most known food dyes
Solubility (water, olive oil, sorbitol, PEG, Glycerin)
Biological Activities
Salmonella
Staphylococcus aureus
E. coli O157:H7
Listeria monocytogenes
Concentration range
Light Intensity
Contact Time
10. PHASE II:
Food and Hard Surface Screening
~2.0 Log ~1.0 Log
Evaluation against E. coli and Listeria
monocytogenes
Concentration range @ 16 hours
Variation in effectiveness
11. PHASE II:
Food and Hard Surface Screening
Evaluation against
Salmonella and
Listeria
monocytogenes
Concentration range
@ 16 hours
Variation in
effectiveness
3.8 Log reduction for
Listeria
2.4 Log Reduction for
Salmonella
12. PHASE II:
Food and Hard Surface Screening
Hard Surface Evaluation against E. coli
40 ppm @ 3.5 hours
4.5 Log Reduction
13. PHASE III:
Filing with CFIA
Registration Package:
AOAC Carrier Testing
Log10 Reduction Testing
Label Claim Organisms (Salmonella, S. aureus, E. coli
O157:H7, Listeria monocytogenes, Campylobacter jejuni)
Must Demonstrate 95% killing (~1.5 Log Reduction)
40 ppm under light intensity of 680-780 lumens using
Lithonia Lighting at 24±2 °C for 3.5 hours
COA
Sample Label
IFU
16. Sani-LuxTM Summary
Broad spectrum kill: Listeria, Staphylococcus,
Campylobacter, E. coli and Salmonella, as well as
fungal pathogens such as Fusarium, Aspergillus,
Pythium, and Penicillium species.
Effective on a variety of surfaces: can be used on
stainless steel, ceramic, plastic, concrete, or granite.
Non-corrosive to metals encountered in household,
beverage and food processing applications.
Non-toxic (Approved for use in foods at 100X the active
concentration).
GREEN: contains only natural products.
Natural Deodorizer: Leaves cleaned areas smelling
fresh.
Continually active when a light source is present.