Effects of TiO2-UVC photocatalysis and thermal pasteurisation on microbial inactivation and quality characteristics of the Korean rice-and-malt drink sikhye

Hafiz M. Shahbaz, Sanghun Kim, Jungyeon Hong, Jeong Un Kim, Dong Un Lee, Kashif Ghafoor, Jiyong Park

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Sikhye is a popular Korean rice-and-malt drink. This drink is prepared using a specific traditional process and has short shelf life. Commercial processing using ultra-high temperature affects characteristic colour and flavour attributes and disturbs the traditional method of sikhye preparation. The objective of this study was to compare the effect of TiO2-UVC photocatalysis (TUVP) nonthermal processing with heat-pasteurised and untreated sikhye samples during storage at 4 and 10 °C. TUVP and heat treatments were both sufficient to inhibit regrowth of total aerobic bacteria and coliform during storage. Hunter colour parameter values showed that the colour of sikhye was less affected by TUVP treatment compared to the heat treatment. Higher sensory scores for flavour, taste and overall preference were attained for low-dosage TUVP-treated (0.24 J cm-2) samples than for heat-treated samples but without a significant difference. TUVP treatment effectively controlled the microbial growth during storage at 4 °C for more than 18 days which was reported a serious microbiological safety issue. In summary, TUVP showed its suitability for commercialisation possibilities of fresh sikhye drink by inactivating the main micro-organisms and thus increasing significantly its shelf life with minimum impact on quality characteristics.

Original languageEnglish
Pages (from-to)123-132
Number of pages10
JournalInternational Journal of Food Science and Technology
Volume51
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

All Science Journal Classification (ASJC) codes

  • Food Science
  • Industrial and Manufacturing Engineering

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