Decontamination of sugar syrup by pulsed light

Journal of Food Protection
Aline ChaineFrédéric Carlin

Abstract

The pulsed light produced by xenon flash lamps was applied to 65 to 67 °Brix sugar syrups artificially contaminated with suspensions of Saccharomyces cerevisiae and with spores of Bacillus subtilis, Geobacillus stearothermophilus, Alicyclobacillus acidoterrestris, and Aspergillus niger. The emitted pulsed light contained 18.5 % UV radiation. At least 3-log reductions of S. cerevisiae, B. subtilis, G. stearothermophilus, and A. acidoterrestris suspended in 3-mm-deep volumes of sugar syrup were obtained with a fluence of the incident pulsed light equal to or less than 1.8 J/cm(2), and the same results were obtained for B. subtilis and A. acidoterrestris suspended in 10-mm-deep volumes of sugar syrup. A. niger spores would require a more intense treatment; for instance, the maximal log reduction was close to 1 with a fluence of the incident pulsed light of 1.2 J/cm(2). A flowthrough reactor with a flow rate of 320 ml/min and a flow gap of 2.15 mm was designed for pulsed light treatment of sugar syrup. Using this device, a 3-log reduction of A. acidoterrestris spores was obtained with 3 to 4 pulses of incident pulsed light at 0.91 J/cm(2) per sugar syrup volume.

References

Sep 18, 2002·Journal of Food Protection·Wayne L SmithJames S Cullor
Apr 16, 2004·Journal of Food Protection·F Fine, P Gervais
Aug 9, 2005·International Journal of Food Microbiology·V M Gómez-LópezJ Debevere
Feb 3, 2007·International Journal of Food Microbiology·Melinda B MurrayLarry R Beuchat
Nov 13, 2007·Journal of Food Science·K KrishnamurthyJ M Irudayaraj
Dec 9, 2008·International Journal of Food Microbiology·Mariam BegumDi Miskelly
Sep 9, 2009·Foodborne Pathogens and Disease·Manuela FernándezEva Hierro
Sep 20, 2011·International Journal of Food Microbiology·Caroline LevyFrédéric Carlin
Aug 1, 1991·Journal of Food Protection·Timothy LillyHaim M Solomon

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Citations

Jan 3, 2013·Photochemistry and Photobiology·Julia EsbelinFrédéric Carlin
Jan 13, 2015·Critical Reviews in Food Science and Nutrition·V HeinrichW Kneifel
Dec 30, 2016·Journal of Applied Microbiology·B KramerP Muranyi
Dec 24, 2018·International Journal of Food Microbiology·Franziska KochPeggy G Braun

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