Enhancement of bactericidal effects of sodium hypochlorite in chiller water with food additive grade calcium hydroxide

The Journal of Veterinary Medical Science
Chiharu ToyofukuKazuaki Takehara

Abstract

An alkaline agent, namely food additive grade calcium hydroxide (FdCa(OH)2) in solution at 0.17%, was evaluated for its bactericidal efficacies in chiller water with sodium hypochlorite (NaOCl) at a concentration of 200 ppm total residual chlorine. Without organic material presence, NaOCl could inactivate Salmonella Infantis and Escherichia coli within 5 sec, but in the presence of fetal bovine serum (FBS) at 0.5%, the bactericidal effects of NaOCl were diminished completely. FdCa(OH)2 solution required 3 min to inactivate bacteria with or without 5% FBS. When NaOCl and FdCa(OH)2 were mixed at the final concentration of 200 ppm and 0.17%, respectively, the mixed solution could inactivate bacteria at acceptable level (10(3) reduction of bacterial titer) within 30 sec in the presence of 0.5% FBS. The mixed solution also inhibited cross-contamination with S. Infantis or E. coli on chicken meats. It was confirmed and elucidated that FdCa(OH)2 has a synergistic effect together with NaOCl for inactivating microorganisms.

References

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Apr 8, 2016·The Journal of Veterinary Medical Science·Hakimullah HakimKazuaki Takehara

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Citations

Feb 5, 2019·The Journal of Veterinary Medical Science·Miyuki KomuraKazuaki Takehara
Sep 6, 2020·Journal of Applied Microbiology·Arshdeep SinghMinto Michael
Jul 12, 2019·The Journal of Veterinary Medical Science·Md Shahin AlamKazuaki Takehara
Mar 4, 2020·Journal of Food Science and Technology·Hevelin Regiane Augusto SilvaLizziane Kretli Winkelstroter

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