Lethality Calculation of Particulate Liquid Foods during Aseptic Processing
| Autor: | Petra Först, Heiko Briesen, Mohd Tarmizan Ibrahim, Jörg Zacharias |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
aseptic processing
Materials science Bioengineering 02 engineering and technology non-spherical particles 010501 environmental sciences lcsh:Chemical technology 01 natural sciences Pipe flow Physics::Fluid Dynamics lcsh:Chemistry 020401 chemical engineering Heat exchanger heat transfer Chemical Engineering (miscellaneous) Quantitative Biology::Populations and Evolution lcsh:TP1-1185 0204 chemical engineering particulate foods 0105 earth and related environmental sciences Range (particle radiation) model Process Chemistry and Technology sterility Laminar flow Mechanics ddc Volumetric flow rate lcsh:QD1-999 Heat transfer Particle Particle size |
| Zdroj: | Processes, Vol 7, Iss 9, p 587 (2019) Processes Volume 7 Issue 9 |
| ISSN: | 2227-9717 |
| Popis: | In the past two decades, aseptic processing has been implemented in the food industry to sterilize particulate liquid food mixtures. To ensure that particulates in the liquid receive sufficient heating, mathematical modeling is employed to evaluate the temperature and lethality level in the particles. We developed a model for the thermal processing of liquid foods containing cubic particles in a continuous laminar pipe flow system, comprising a tubular heat exchanger. In our simplified approach, heat transfer equations for particulate liquid foods were solved analytically and numerically to evaluate the effect of certain process parameters on the time temperature profiles of particles and the lethality value in the products. A comparison of the particles&rsquo lethality values was made between the experiment and simulation for two different particle residence times in a case study, and the model predictions were in good agreement with experimental data. Based on modeling studies, it was found that within the range of parameters studied, an increase in flow rate and particle size resulted in a decrease in the lethality value of the particles, while an increase in particle concentration and holding tube length resulted in the opposite effect. |
| Databáze: | OpenAIRE |
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