Validation of hydrodynamic and microbial inactivation models for UV-C treatment of milk in a swirl-tube ‘SurePure Turbulator™’

Federico Alberini; Mark J.h. Simmons; David Parker; Tatiana Koutchma

doi:10.1016/j.jfoodeng.2015.04.009

Validation of hydrodynamic and microbial inactivation models for UV-C treatment of milk in a swirl-tube ‘SurePure Turbulator™’

Federico Alberini, Mark J.h. Simmons, David Parker, Tatiana Koutchma

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Abstract

The Positron Emission Particle Tracking (PEPT) flow visualisation technique has been applied to determine the hydrodynamic performance of a full-scale transparent model of a SurePure Turbulator™ used for the microbial treatment of turbid dairy fluids using UV-C radiation. The effect of flow rate upon the refreshment of fluid at the surface of the UV source has been investigated using two model fluids each possessing the same viscosities as milk and cream respectively. The amount of surface refreshment is modelled as a time density function close the surface of UV-C source and incorporated into an existing first order microbial inactivation model and a Weibull distribution model. Fitting to experimental data obtained for the inactivation of selected milk pathogens using the Turbulator™ have demonstrated the superiority of the Weibull model. These models enable a more precise estimation of UV-C energy requirement for the inactivation of the milk borne pathogenic organisms to be made since the amount of surface refreshment affords a significant performance enhancement.

Original language	English
Pages (from-to)	63-69
Number of pages	7
Journal	Journal of Food Engineering
Volume	162
Early online date	22 Apr 2015
DOIs	https://doi.org/10.1016/j.jfoodeng.2015.04.009
Publication status	Published - 1 Oct 2015

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Alberini_et_al_Validation_hydrodynamic_microbial_Journal_Food_Engineering_2015
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Food Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Food Engineering, Vol 162, October 2015, DOI: 10.1016/j.jfoodeng.2015.04.009 Eligibility for repository checked
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http://linkinghub.elsevier.com/retrieve/pii/S0260877415001600

Platform Grant for the University of Birmingham Positron Imaging Centre
Parker, D., Bakalis, S., Barigou, M., Seville, J. & Fryer, P.
Engineering & Physical Science Research Council
1/01/09 → 31/12/13
Project: Research Councils

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@article{b7108e6576734563aecc832836264376,

title = "Validation of hydrodynamic and microbial inactivation models for UV-C treatment of milk in a swirl-tube {\textquoteleft}SurePure Turbulator{\texttrademark}{\textquoteright}",

abstract = "The Positron Emission Particle Tracking (PEPT) flow visualisation technique has been applied to determine the hydrodynamic performance of a full-scale transparent model of a SurePure Turbulator{\texttrademark} used for the microbial treatment of turbid dairy fluids using UV-C radiation. The effect of flow rate upon the refreshment of fluid at the surface of the UV source has been investigated using two model fluids each possessing the same viscosities as milk and cream respectively. The amount of surface refreshment is modelled as a time density function close the surface of UV-C source and incorporated into an existing first order microbial inactivation model and a Weibull distribution model. Fitting to experimental data obtained for the inactivation of selected milk pathogens using the Turbulator{\texttrademark} have demonstrated the superiority of the Weibull model. These models enable a more precise estimation of UV-C energy requirement for the inactivation of the milk borne pathogenic organisms to be made since the amount of surface refreshment affords a significant performance enhancement.",

author = "Federico Alberini and Simmons, {Mark J.h.} and David Parker and Tatiana Koutchma",

year = "2015",

month = oct,

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doi = "10.1016/j.jfoodeng.2015.04.009",

language = "English",

volume = "162",

pages = "63--69",

journal = "Journal of Food Engineering",

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T1 - Validation of hydrodynamic and microbial inactivation models for UV-C treatment of milk in a swirl-tube ‘SurePure Turbulator™’

AU - Alberini, Federico

AU - Simmons, Mark J.h.

AU - Parker, David

AU - Koutchma, Tatiana

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The Positron Emission Particle Tracking (PEPT) flow visualisation technique has been applied to determine the hydrodynamic performance of a full-scale transparent model of a SurePure Turbulator™ used for the microbial treatment of turbid dairy fluids using UV-C radiation. The effect of flow rate upon the refreshment of fluid at the surface of the UV source has been investigated using two model fluids each possessing the same viscosities as milk and cream respectively. The amount of surface refreshment is modelled as a time density function close the surface of UV-C source and incorporated into an existing first order microbial inactivation model and a Weibull distribution model. Fitting to experimental data obtained for the inactivation of selected milk pathogens using the Turbulator™ have demonstrated the superiority of the Weibull model. These models enable a more precise estimation of UV-C energy requirement for the inactivation of the milk borne pathogenic organisms to be made since the amount of surface refreshment affords a significant performance enhancement.

AB - The Positron Emission Particle Tracking (PEPT) flow visualisation technique has been applied to determine the hydrodynamic performance of a full-scale transparent model of a SurePure Turbulator™ used for the microbial treatment of turbid dairy fluids using UV-C radiation. The effect of flow rate upon the refreshment of fluid at the surface of the UV source has been investigated using two model fluids each possessing the same viscosities as milk and cream respectively. The amount of surface refreshment is modelled as a time density function close the surface of UV-C source and incorporated into an existing first order microbial inactivation model and a Weibull distribution model. Fitting to experimental data obtained for the inactivation of selected milk pathogens using the Turbulator™ have demonstrated the superiority of the Weibull model. These models enable a more precise estimation of UV-C energy requirement for the inactivation of the milk borne pathogenic organisms to be made since the amount of surface refreshment affords a significant performance enhancement.

U2 - 10.1016/j.jfoodeng.2015.04.009

DO - 10.1016/j.jfoodeng.2015.04.009

M3 - Article

SN - 0260-8774

VL - 162

SP - 63

EP - 69

JO - Journal of Food Engineering

JF - Journal of Food Engineering

ER -

Validation of hydrodynamic and microbial inactivation models for UV-C treatment of milk in a swirl-tube ‘SurePure Turbulator™’

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Platform Grant for the University of Birmingham Positron Imaging Centre

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