2008 journal article

Design of conservative simulated particles for validation of a multiphase aseptic process


By: A. Jasrotia n, J. Simunovic n, K. Sandeep n, T. Palazoglu n & K. Swartzel n

co-author countries: Türkiye 🇹🇷 United States of America 🇺🇸
author keywords: critical particle; conservative particle design; multiphase aseptic processing; time-temperature history; validation
MeSH headings : Computer Simulation; Food Handling / instrumentation; Food Handling / methods; Food Microbiology; Food Preservation / methods; Food Preservation / standards; Humans; Hydrogen-Ion Concentration; Models, Chemical; Particle Size; Temperature; Time Factors
Source: Web Of Science
Added: August 6, 2018

Simulated food particles with conservative (fast moving and slow heating) properties are required for validation of multiphase aseptic processing for production of shelf-stable low-acid foods. The validation process requires simulated particles to contain residence time tags, thermosensitive implants, and/or bioloads for temperature detection, time-temperature integration, and bactericidal efficacy confirmation. Conservative particle design (CPD) software was used to determine the wall thickness required for conservative behavior of such particles made with polypropylene (PP) and polymethylpentene (PMP) of wall thickness 1 mm (0.0393 inches) and 2 mm (0.0787 inches) containing tube inserts. Thermocouples were inserted in the simulated and real food particles and the particles were heated up to 127 degrees C under pressurized (24 psi) conditions. Based on the heating rates of the real and simulated particles, an appropriate simulated particle was identified for each type of real food particle. This would allow a food processor to use these designed particles with an appropriate tube insert (diameter) to validate an aseptic process for a multiphase food containing any or all the above tested food materials.