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Related Experiment Videos

Transport considerations for microbiological control in piping

P T Noble1

  • 1Fluor Daniel GmbH, Wiesbaden Germany.

Journal of Pharmaceutical Science and Technology : the Official Journal of PDA
|March 1, 1994
PubMed
Summary

Transport limitations in piping dead legs hinder effective microbiological control. This study proposes specific design guidelines for thermal and ozone disinfection systems to improve disinfection efficacy in clean piping.

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Area of Science:

  • Industrial microbiology
  • Chemical engineering
  • Fluid dynamics

Background:

  • Microbiological control in clean piping systems is crucial for product quality and safety.
  • Transport processes significantly limit the distribution of disinfecting agents.
  • Piping dead legs represent critical areas with high transport resistance.

Purpose of the Study:

  • To analyze transport in piping dead legs for thermal and ozone disinfection methods.
  • To evaluate the effectiveness of current clean piping design guidelines.
  • To propose technology-specific guidelines for improved disinfection.

Main Methods:

  • Theoretical analysis of transport phenomena in piping dead legs.
  • Modeling of disinfection medium distribution for thermal and ozone treatments.
  • Comparison of disinfection efficacy under different design scenarios.

Main Results:

  • Established clean piping design guidelines are not universally applicable for disinfection.
  • Ozone treatment in dead legs can be as reliable as thermal treatment with proper design.
  • Increasing circulating velocity is recommended for scaling up thermal disinfection systems.

Conclusions:

  • Technology-specific design guidelines are necessary for effective microbiological control in clean piping.
  • Differentiating between permanent and temporary dead legs is key for ozonated systems.
  • Optimized transport is essential for reliable disinfection in critical piping zones.

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