STUDIES ON VIRUS INACTIVATION BY CHLORINE DURING WATER DISINFECTION

1 January 1976

journal article
research article

Vol. 162 (3-4) , 320-329

Abstract

Water-borne transmission of viral diseases and the problems involved in virus inactivation by water chlorination are discussed. In contrast to the amount of free Cl, the value of the oxidation-reduction potential (ORP) was a criterion of virus inactivation. For virus inactivation, higher ORP values and longer periods of contact than for the killing of bacteria were necessary. To ensure the inactivation of poliovirus in water contaminated with organic substances, an ORP of +750 mV (0.3-0.6 mg/l free Cl) should be maintained for 15-30 min. Adenovirus showed an almost identical resistance to inactivation. Possibilities for utilizing the mechanism of virus inactivation by the action of chemical disinfectants are discussed.

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