Decontamination efficacy of neutral electrolyzed water to eliminate indigenous flora on a large-scale of cabbage and carrot both in the laboratory and on a real processing line

Food Research International
Na Young LeeMin Suk Rhee

Abstract

The decontamination efficacy of neutral electrolyzed water (NEW) was evaluated using shredded cabbages and carrots in both a scalable laboratory system (experiment I) and an actual processing line in a plant (experiment II). In experiment I, the antimicrobial effect of highly concentrated NEW (up to the maximum regulated level: 200ppm) was tested to determine the appropriate conditions for use in an actual plant test: (1) hypochlorous acid (HClO) concentration (100, 150, and 200ppm), (2) ratio of sample weight to NEW volume (1:5, 1:10, and 1:20), and (3) treatment time (5, 10, 20, and 30min), using 2kg of shredded cabbages and carrots. In experiment II, the feasibility of the NEW treatment was validated on an actual processing line (treatment unit: 20kg), including cutting, three washing steps (two air bubble washes for 5min each and 150ppm NEW for 5min at ratio of 1:10), rinsing (5min), and dehydration (5min). Overall, the microbial reductions tended to increase as the HClO concentration, ratio of sample to NEW, and treatment time increased. The results obtained from experiment I indicated that the maximum conditions (NEW 200ppm, 1:20, 30min) achieved 3.3-3.5 log CFU/g reductions in the coliform counts. After treatment with 20...Continue Reading

Citations

Sep 30, 2020·Journal of Food Protection·Zachary BlockChawalit Kocharunchitt
May 1, 2016·Comprehensive Reviews in Food Science and Food Safety·Sme RahmanDeog-Hwan Oh

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