Pulsed UV-light treatment of corn meal for inactivation of Aspergillus niger spores

Soojin Jun; Joseph Irudayaraj; Ali Demirci; David Geiser

doi:10.1046/j.0950-5423.2003.00752.x

Pulsed UV-light treatment of corn meal for inactivation of Aspergillus niger spores

Soojin Jun, Joseph Irudayaraj, Ali Demirci, David Geiser

Research output: Contribution to journal › Article › peer-review

Abstract

Fungal contamination of grains, intended for human and animal consumption, during the pre/post-harvest periods has been a recurring health hazard. A pulsed UV-light system was used to inactivate fungal spores of Aspergillus niger in corn meal. Response surface methodology was utilized for experimental design. The three process parameters evaluated were treatment time (20-100 s), voltage input (2000-3800 V), and distance from the UV strobe (3-13 cm). Optimization of the process parameters was validated by a quadratic regression equation designed to fit the experimental log₁₀ reduction of fungal spores. Model prediction for a 100-s treatment time, 3 cm of distance from the UV strobe, and with 3800 V input gave a 4.93log₁₀ reduction of A. niger. Modification of the pulsed UV-light system was recommended to maximize the UV fungal disinfection while minimizing the heat generation.

Original language	English (US)
Pages (from-to)	883-888
Number of pages	6
Journal	International Journal of Food Science and Technology
Volume	38
Issue number	8
DOIs	https://doi.org/10.1046/j.0950-5423.2003.00752.x
State	Published - Dec 2003
Externally published	Yes

Keywords

Flour
Fungal spore
Lethality
Rapid inactivation
Response surface

ASJC Scopus subject areas

Food Science
Industrial and Manufacturing Engineering

Online availability

10.1046/j.0950-5423.2003.00752.x

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title = "Pulsed UV-light treatment of corn meal for inactivation of Aspergillus niger spores",

abstract = "Fungal contamination of grains, intended for human and animal consumption, during the pre/post-harvest periods has been a recurring health hazard. A pulsed UV-light system was used to inactivate fungal spores of Aspergillus niger in corn meal. Response surface methodology was utilized for experimental design. The three process parameters evaluated were treatment time (20-100 s), voltage input (2000-3800 V), and distance from the UV strobe (3-13 cm). Optimization of the process parameters was validated by a quadratic regression equation designed to fit the experimental log10 reduction of fungal spores. Model prediction for a 100-s treatment time, 3 cm of distance from the UV strobe, and with 3800 V input gave a 4.93log10 reduction of A. niger. Modification of the pulsed UV-light system was recommended to maximize the UV fungal disinfection while minimizing the heat generation.",

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author = "Soojin Jun and Joseph Irudayaraj and Ali Demirci and David Geiser",

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AU - Demirci, Ali

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PY - 2003/12

Y1 - 2003/12

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AB - Fungal contamination of grains, intended for human and animal consumption, during the pre/post-harvest periods has been a recurring health hazard. A pulsed UV-light system was used to inactivate fungal spores of Aspergillus niger in corn meal. Response surface methodology was utilized for experimental design. The three process parameters evaluated were treatment time (20-100 s), voltage input (2000-3800 V), and distance from the UV strobe (3-13 cm). Optimization of the process parameters was validated by a quadratic regression equation designed to fit the experimental log10 reduction of fungal spores. Model prediction for a 100-s treatment time, 3 cm of distance from the UV strobe, and with 3800 V input gave a 4.93log10 reduction of A. niger. Modification of the pulsed UV-light system was recommended to maximize the UV fungal disinfection while minimizing the heat generation.

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KW - Lethality

KW - Rapid inactivation

KW - Response surface

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Pulsed UV-light treatment of corn meal for inactivation of Aspergillus niger spores

Abstract

Keywords

ASJC Scopus subject areas

Online availability

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