Effects of uv irradiation in a continuous turbulent flow uv reactor on microbiological and sensory characteristics of cow's milk

P. V. Rossitto, James S Cullor, J. Crook, J. Parko, P. Sechi, B. T. Cenci-Goga

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The dairy industry under current pasteurization conditions (15 s at 72°C) and sanitary standards achieves a safe product with excellent quality. In an ever-competitive market there is still a need to improve product quality and extend shelf life of dairy products to increase competitiveness and open up new markets. In an attempt to test the effect of UV irradiation on microbiota of fluid milk, a continuous flow UV system at 254 nm was used to treat 3.5 and 2% fat milk at two UV doses (880 and 1,760 J liter-1). Milk was obtained from three processors, and two lots from each processor were assessed. To assess the impact on the most descriptive native microbiota in pasteurized milk after UV illumination, the product was held at two storage temperatures (4 and 7°C) and tested weekly for 5 weeks for aerobic plate counts (psychrotrophic and mesophilic bacteria), laboratory pasteurization counts, aerobic sporeformers, coliform organisms, and titratable acidity. Microbial counts for all tested microorganisms were lower in UV-treated milk when compared with control throughout storage at 4 and 7°C in both 3.5 and 2% fat milk. Sensory analysis indicated that there is a sensory defect associated with UV treatment at the wavelength used.

Original languageEnglish (US)
Pages (from-to)2197-2207
Number of pages11
JournalJournal of Food Protection
Volume75
Issue number12
DOIs
StatePublished - Dec 2012

Fingerprint

turbulent flow
pasteurization
milk fat
sensory properties
Milk
irradiation
fluid milk
milk
new markets
pasteurized milk
dairy industry
titratable acidity
product quality
plate count
storage temperature
dairy products
sensory evaluation
lighting
Pasteurization
wavelengths

ASJC Scopus subject areas

  • Food Science
  • Microbiology

Cite this

Effects of uv irradiation in a continuous turbulent flow uv reactor on microbiological and sensory characteristics of cow's milk. / Rossitto, P. V.; Cullor, James S; Crook, J.; Parko, J.; Sechi, P.; Cenci-Goga, B. T.

In: Journal of Food Protection, Vol. 75, No. 12, 12.2012, p. 2197-2207.

Research output: Contribution to journalArticle

Rossitto, P. V. ; Cullor, James S ; Crook, J. ; Parko, J. ; Sechi, P. ; Cenci-Goga, B. T. / Effects of uv irradiation in a continuous turbulent flow uv reactor on microbiological and sensory characteristics of cow's milk. In: Journal of Food Protection. 2012 ; Vol. 75, No. 12. pp. 2197-2207.
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