Destruction of Helminth ( Ascaris suum ) Eggs by Ozone

Author: Velásquez Ma. Teresa   Martínez José   Monje–Ramírez Ignacio   Rojas-Valencia Ma. Neftalí  

Publisher: Taylor & Francis Ltd

ISSN: 0191-9512

Source: Ozone: Science and Engineering, Vol.26, Iss.4, 2004-08, pp. : 359-366

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Abstract

ABSTRACT Based on the properties of ozone as a strong germicidal agent, the inactivation kinetics or disintegration of Ascaris suum eggs in water were studied. Ozone was applied in synthetic samples, the concentration of dissolved ozone in the liquid phase was typically between 3.5 to 4.7mg/L, pH 5, 9. The value of 90% inactivation (t 90 ) obtained was at 1 h, the remaining 10% being inactivated in 2 h. A linear correlation between the logarithm of bacterial or yeast concentration (N) and contact time was found, being the linear significant correlation coefficient ( r of 0.95). That 2-log inactivation occurred at a CT value near 4.7mg/min/L. The best reduction percentage was of 99.00 in 120min. It therefore could be demonstrated that ozone indeed induces effects on the helminth eggs.

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