Abstract
The numbers of enteroviruses, classical bacterial indicators and physico-chemical parameters were recorded for raw and treated wastewaters from the NANCY (FRANCE) activated sludge treatment plant, over 24 and 72 hours periods. Sampling was performed manually by collection of 2 and 3 hour interval dip samples and by sequential automatic samplers. The results obtained with both methods are in good agreement; 24 hours composite samples with automatic sampling are representative of enteroviruses flux and thus allow studies of the efficiency of removal treatments. According to both sampling methods, the efficiency of the NANCY wastewater treatment plant is about 84 % for the removal of indigenous enteric viruses.
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