1 / 12

Heat Sterilizers

Heat Sterilizers. SEPAK Industries, 2006. Outline. Purpose Types of Sterilizers Functionality and Appearance Our Design Questions. Why Heat Sterilizers?. Sterilize: free of all living organisms Nutrient media sterilization is essential to all fermentation processes

lorna
Download Presentation

Heat Sterilizers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Heat Sterilizers SEPAK Industries, 2006

  2. Outline • Purpose • Types of Sterilizers • Functionality and Appearance • Our Design • Questions

  3. Why Heat Sterilizers? • Sterilize: free of all living organisms • Nutrient media sterilization is essential to all fermentation processes • Proper growth, consistent product • Food, Pharmaceutics are ingested

  4. Sterilization Solutions • Batch / Continuous • Indirect / Direct Heat • Classifications: • HTST • UHT

  5. Our Design Solution • HTST Sterilizer • Plate Heat Exchangers • Indirect heating • Steam for Heat • Cold Water for Cooling

  6. How HTST Sterilizers Work? Springer (2000)

  7. Appearance SEPAK Industries, 2006

  8. Advantages of HTST • Reduces Denaturing • Avoids Dilution • Reduced downtime • Uniform heating • Large Surface Area • Compact, small “footprint” for SA provided • Turbulence generated, high heat transfer coefficient

  9. Disadvantages of HTST • Fouling of heat exchanger due to salts in media • Corrosion of pipes from high T,P steam • Lower Heat Exchanger Efficiency vs. Direct Sterilization (SIP – Steam In Place)

  10. Design Considerations • Variables to Consider: • Bacteria Present (Temperature -> Length) • Pipe Diameter (Turbulence Flow) • “Kill Ratio”

  11. Our Design – Main Sterilizer • HTST Type I Problem (CHEE380, Dr. Daugulis) • Temp=150oC (Design), 160oC (Safety) • Bacillus stereothermophilus and Clostridium botulinum – Extremely heat resistant! • Length=~3.3m • Bulk Velocity=0.17m/s (turbulent) • Time=~19s

  12. Questions?

More Related