The virological efficiency of individual treatment processes in a plant which produces drinking water from water of the river Oise was investigated. The plant had a capacity of 270,000 to 360,000 m3/d. The sequence of treatment processes was preozonation (0.5 - 1 mg/l)-storage - coagulation - flocculation - settling - sand filtration-second stage ozomtion (2.0 mg/l) - activated carbon filtration - post ozonation (0.4 mg/l free residual for 4 min)- chlorine dioxide (0.1 mg/l). Nine series of samples were taken after various treatment stages and analysed. Viruses were recovered by an absorption-elution method using electronegative (C 100-12 Balston) or electropositive (Virosorb 1 MDS Cuno) filters. The volume of water tested varied between 30 and 1 000 1, depending on filtration efficiency. BGM cells were used for virus detection, and all samples of raw water yielded positive results, with counts between 10 and 146 PFU/1 000 l.Viral counts decreased by 89%, 77% and 55% after intermittent preozonation and storage, settling and sand filtration, respectively. No viruses were recovered from the water after the second stage ozonation. The subsequent post-ozonation and final treatment with chlorine dioxide served as additional barriers to ensure a virologically safe drinking water supply.
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Research Article|
October 01 1985
Study of Indigenous Virus Removal at Different Stages in a Drinking Water Plant Treating River Water
F. Agbalika;
F. Agbalika
*Laboratoire d'Hygiène et de Recherche en Santé Publique, Faculté de Médecine, F 54500, Vandoeuvre les Nancy, France
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P. Hartemann;
P. Hartemann
*Laboratoire d'Hygiène et de Recherche en Santé Publique, Faculté de Médecine, F 54500, Vandoeuvre les Nancy, France
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J. C. Joret;
J. C. Joret
**Compagnie Générale des Eaux, 52 Rue d'Anjou, F 75008 Paris, France
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A. Hassen;
A. Hassen
***Faculté des Sciences et Techniques de SFAX, Campus Universitaire, 1060 Tunis, Tunisia
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M. M. Bourbigot
M. M. Bourbigot
*Laboratoire d'Hygiène et de Recherche en Santé Publique, Faculté de Médecine, F 54500, Vandoeuvre les Nancy, France
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Water Sci Technol (1985) 17 (10): 211–218.
Citation
F. Agbalika, P. Hartemann, J. C. Joret, A. Hassen, M. M. Bourbigot; Study of Indigenous Virus Removal at Different Stages in a Drinking Water Plant Treating River Water. Water Sci Technol 1 October 1985; 17 (10): 211–218. doi: https://doi.org/10.2166/wst.1985.0112
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