Articles

EFFECT OF ELECTROLYSED WATER (ANOLYTE) DIPPING ON MICROBIAL, PHYSICOCHEMICAL AND SENSORIAL QUALITY OF DATE FRUIT

Article number
934_88
Pages
683 – 688
Language
English
Abstract
The ‘Deglet Nour’ date is well-known for its unique taste, its particular aroma, its golden-yellow color and its nutritional value.
In Tunisia, this cultivar is of higher market value and is the highest-valued cultivar on international markets.
Tunisia is currently the 10th world producer and the lead exporter of ‘Deglet Nour’ dates.
However, handlers often encounter quality problems (microbiological and physicochemical) which are enhanced by the long storage period.
The aim of this study was to ensure a good conservation of dates using anolyte solution to reduce initial bacterial populations and proliferation during storage and thus increase the shelf life of a better quality product.
Anolyte is an environmentally safe oxidizing solution that can be used as a biocidal agent.
It combines washing, disinfecting and sterilizing agent features and it degrades spontaneously.
In this work, the effect of anolyte water (pH 7-7.5; ORP 800-850 mV) is studied, as an ecologically safe alternative for disinfecting dates.
Dates were dipped in anolyte/water solutions at three concentrations (1, 3 and 5%) and for various durations (0, 0.5, 1, 2, 3 and 4 min). The percent reduction in the total bacterial, yeast and molds counts were determined after each treatment.
Microbial analysis after treatment showed a reduction of the total count of mesophilic bacteria, up to 99.5% and completely eliminated yeast and molds from date fruit.
Tests of optimum condition showed no effect on pH value, acidity, sucrose, reducing sugars, and moisture content of the product.
In addition, sensory evaluation based on a triangle test showed no significant difference (P>0.05) between treated and fresh dates for the following descriptors: taste, odor, texture and color.

Publication
Authors
H. Bessi, H. Debbabi, K. Grissa , S. Bellagha
Keywords
dates, Phoenix dactylifera, anolyte, oxidation-reduction potential (ORP), quality
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