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dc.contributor.authorNicolau Lapeña, Iolanda
dc.contributor.authorAbadias i Sero, Mª Isabel
dc.contributor.authorViñas Almenar, Inmaculada
dc.contributor.authorBobo, Gloria
dc.contributor.authorLafarga, Tomás
dc.contributor.authorRibas‐Agustí, Albert
dc.contributor.authorAguiló-Aguayo, Ingrid
dc.description.abstractDisinfection of fruits is one of the most important steps since they are going to be eaten fresh-or minimally-processed. This step affects quality, safety, and shelf-life of the product. Despite being a common sanitizer in the fruit industry, chlorine may react with organic matter leading to the formation of toxic by-products. Alternative sustainable disinfection strategies to chlorine are under study to minimize environmental and human health impact. Water-assisted UV-C light (WUV-C) is proposed here as an alternative sanitizing method for strawberries. In this study, strawberries were washed for 1 or 5 min in a tank with 2 or 4 lamps on, each emitting UV-C light at 17.2 W/cm2, or in a chlorine solution (200 ppm, pH 6.5). Moreover, trials with 4 lamps on, together with a washing solution consisting on peracetic acid at 40 or 80 ppm, were carried out. Overall, quality and nutritional parameters of strawberries after treatments were maintained. Changes in color were not noticeable and fruits did not lose firmness. No major changes were observed in antioxidant activity, organic acid, anthocyanin, vitamin C, and total phenolic content. Yeasts and molds were not affected by the WUV-C treatment, and 5 min were needed to significantly reduce total aerobic mesophylls population. However, reductions of artificially inoculated Listeria innocua and Salmonella Typhimurium after WUV-C treatments were comparable to those obtained with chlorine-wash, which were 3.0 log CFU / g. Moreover, WUV-C light was effective to minimize microorganisms remaining in washing water, avoiding cross-contamination and thus, allowing water recirculation. This effect was improved when combining the action of UV-C light with peracetic acid, showing the suitability of this combined treatment, understood as an alternative to chlorine sanitation, for sanitizing strawberries and keeping the populations of pathogenic bacteria in washing water lower than 0.6 ± 0.1 log CFU / mL.ca_ES
dc.description.sponsorshipThe authors are thankful to ‘Ministerio de Economía, Industria y Competitividad’ for the financial support of the project AGL2016-78086-R. I. Nicolau-Lapeña is in receipt of a predoctoral grant awarded by the ‘Ministerio de Economía, Industria y Competitividad’ (grant number BES-2017-079779). Dr. I. Aguiló-Aguayo thanks the National Programme for the Promotion of Talent and Its Employability of the ‘Ministerio de Economía, Industria y Competitividad’ of the Spanish Government and the European Social Fund for her Postdoctoral Senior Grant ‘Ramon y Cajal’ (RYC-2016-2019 949).ca_ES
dc.relation.isformatofVersió postprint del document publicat a
dc.relation.ispartofInternational Journal of Food Microbiology, 2020, vol. 335, p. 108887-1-108887-11ca_ES
dc.rightscc-by-nc-nd (c) Elsevier, 2020ca_ES
dc.subjectOrganic acidsca_ES
dc.subjectListeria innocuaca_ES
dc.subjectSalmonella Typhimuriumca_ES
dc.subjectUV-C lightca_ES
dc.titleWater UV-C treatment alone or in combination with peracetic acid: A technology to maintain safety and quality of strawberriesca_ES

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cc-by-nc-nd (c) Elsevier, 2020
Except where otherwise noted, this item's license is described as cc-by-nc-nd (c) Elsevier, 2020