Food Preservation Chemical and Modified Atmosphere Packaging

1
Food Preservation Chemical and Modified
Atmosphere Packaging

• Food Microbiology

2
Chemical Preservatives

• Sodium Benzoate
• Sorbate
• Proprionates

3
Chemical Preservatives

• Sulfur Dioxide
• Nitrates and Nitrites
• BHA/BHT

4
Chemical Preservatives

• Salt
• Sugar
• Spices and Essential Oils

5
Chemical Preservatives

• Flavoring Agents
• Fatty acids
• Lactic and Acetic Acid
• Bacteriocins and Antibiotics

6
Modified Atmosphere Preservation

• MAP Modified Atmosphere Packaging
• Carbon Dioxide
• Types
• Hypobaric
• Vacuum Packaging
• MAP
• Equilibrium Modified Atmosphere
• Controlled Atmosphere Packaging

7
MAP Equipment
8
Carbon Dioxide and Microorganisms

• Inhibitory Activity Increases as storage
  temperatures decrease
• 20-30 Optimal
• Inhibition increases as pH decreases
• Gram negative more sensitive than Gram Positive
• Both Lag and Log Phases Inhibited
• Under Pressure More effective

9
Safety and Spoilage Concerns

• Clostridium botulinum
• Listeria monocytogenes
• Spoilage
• Lactobacilli
• B. thermospacta