Application of Highly Purified Electrolyzed Chlorine Dioxide for Tilapia Fillet Disinfection

Abstract EN

This research aimed to develop an electrolysis method to generate high-concentration chlorine dioxide (ClO2) for tilapia fillet disinfection.

The designed generator produced up to 3500 ppm of ClO2 at up to 99% purity.

Tilapia fillets were soaked in a 400 ppm ClO2 solution for 5, 10, and 25 min.

Results show that total plate counts of tilapia, respectively, decreased by 5.72 to 3.23, 2.10, and 1.09 log CFU/g.

In addition, a 200 ppm ClO2 solution eliminated coliform bacteria and Escherichia coli in 5 min with shaking treatment.

Furthermore, ClO2 and trihalomethanes (THMs) residuals on tilapia fillets were analyzed by GC/MS and were nondetectable (GC-MS detection limit was 0.12 ppb).

The results conform to Taiwan’s environmental protection regulations and act governing food sanitation.