TOLERANCE OF THE ROTIFER BRACHIONUS PLICATILIS TO OZONE AND TOTAL OXIDATIVE RESIDUALS

D.A. Davis, C.R. Arnold-1997

Ozone-Science & Engineering, 19: 457-469, in Rotifer News, 30 (Dec '97)

Ozone is utilized extensively by commercial operators for disinfection and treatment of culture water, but there is limited data on tolerance of rotifers to ozone, residual oxidants associated with using ozone in seawater and the efficacy of an ozone wash. A "no observable effect concentration" (NOEC) of 0.22 mg/L TRO was determined for maximum survival of the rotifers. High levels of ozone (greater than or equal to 1.63 mg/L) were found to inactivate rotifer eggs. Based on published values of the inactivation of bacterial and viral pathogens, a NOEC of 0.22 mg/L TRO would appear to be sufficient to inactivate a variety of surficial potential pathogens.

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