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