Transcript Prevention of Food Spoilage

Prevention of Food
Spoilage
Mrs. Dickerson
Food Science
What is Food Spoilage?
• Unpreserved foods will eventually decay
– Result…. Food Spoilage
• Food Spoilage is when foods become unsafe
to eat
• Happens 2 ways
– Improper Handling
– Improper Preservation
Think Back to 1 thing you ate…
• 2 minutes!
• List all of the processes that food had to go
through from field to plate….
• Share with your neighbor
• Fix any ones you missed…
• HACCP (Hazard Analysis Critical Control Points)
What Causes Food Spoilage
• Improper Handling
– Happens along the way as food moves from
•
Field-factory-packaging-market-home-mouth
– A lot of problems with food handling happen in
the home!
• Improper Preservation
– Not when food is consumed after harvest
– Year round purchase of seasonal food
How can Food Spoilage be Prevented?
• Food Preservation- is treating foods to prevent
spoilage
• PREVENTS FOOD SPOILAGE
– (TO AN EXTENT)
– List some examples…..
Food Preservation Methods
1. Heat Preservation
– Applying heat during processing
– MOST EFFECTIVE AT PRESERVING
– Kills bacteria and other microbes
• Example
– Canning
• Longest shelf life of any preserved foods
• Metal or Glass Jars
Food Preservation Methods
2. Freezing
– Lowering temperature below freezing point (32 F)
– Kill or slow bacteria and microbe growth
– Stored months to a year
3. Refrigerating
– Similar to freezing
– Temps not below 32 F
– Stored for days to weeks
Food Preservation Methods
4. Drying
– Removing water from foods
– Most microbes require water
– Can be done mechanically, freeze dried, or
chemically
5. Fermenting ( you know this one )
– Chemical process of changing product
– Microbes convert carbs in food to by-products
– Pickling (ex) adding salt, sugar, and vinegar to
veggies
Food Preservation Methods
6. Curing
– Adding chemicals as a preservation agent
– Meats are commonly cured
7. Irradiation
– Using ionizing radiation to kill bacteria
– Commonly called cold sterilization
8. Aseptic Packaging
– Rapidly heating foods and then immediately
packaging them into sterilized containers