Chapter 28 Applied and Industrial Microbiology
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings B.E Pruitt & Jane J. Stein Chapter 28 Applied and Industrial Microbiology
Foods are preserved by: 。 Drying Osmotic pressure(salt or sugar) 。Fermentation
Foods are preserved by: • Drying • Osmotic pressure (salt or sugar) • Fermentation
Industrial Food Canning ⊙@ Washing, sorting, blanching Steam box Can ③Steaming ④Can sealed ⑤Sterilization Cans ⑦Labeling, filling to exhaust cooled storage, air Retort(see Figure 28.2) and delivery Figure 28.1
Industrial Food Canning Figure 28.1
Commercial Sterilization to Destroy C.botulinum Endospores 12D treatment kills 1012 endospores Surviving endospores of thermophilic anaerobes cause spoilage with gas Or flat-sour spoilage
• 12D treatment kills 1012 endospores • Surviving endospores of thermophilic anaerobes cause spoilage with gas • Or flat-sour spoilage Commercial Sterilization to Destroy C. botulinum Endospores
Food Preservation Presterilized materials assembled into packages and aseptically filled (Aseptic packaging) 。Gamma radiation kills bacteria,insects,and parasitic worms High-energy electrons Figure 28.4
• Presterilized materials assembled into packages and aseptically filled (Aseptic packaging) • Gamma radiation kills bacteria, insects, and parasitic worms • High-energy electrons Food Preservation Figure 28.4