Variations de la charge bactérienne d’un effluent urbain

Boutin, Pierre; Torre, Michele; Girondel, M.-M.

doi:10.1051/water/19791003189

Cited by 1 publication

(2 citation statements)

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“…Only about 25% of the wastewater received at the treatment plant is of industrial origin; thus, the hourly variations observed can be related to the human activity and the living habits of the community. Such variations in wastewater flow have been reported by many authors (4,13).…”

Section: Discussionsupporting

confidence: 75%

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Sampling strategy for detecting viruses in a sewage treatment plant

Rolland¹,

Joret²,

Villeval³

et al. 1983

Appl Environ Microbiol

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A study of pollutant flows was carried out at a wastewater treatment plant in Nancy, France, which used activated-sludge treatment. To carry out observation of hourly flow variation, a sampling strategy needs to be defined. A comparison between two methods of sampling was conducted: dip samples every 2 h over a period of 24 h and one 24-h composite sample were taken from raw and treated wastewater and then analyzed for enteroviruses, fecal coliforms, chemical oxygen demand, biochemical oxygen demand, and suspended solids. The results showed that the hourly variations of these pollutants in the effluents are in good agreement with expectations based upon the customers' usage and the characteristics of the wastewater network. Significant correlations were found between all tested parameters and enteroviruses in raw wastewater. After biological treatment, no correlation remained in treated wastewater between viruses and other parameters. As for the two sampling methods, a rather good representation of the daily load was given by the composite mode of sampling as concerns physicochemical and microbiological parameters. Biological treatment removed an average of 83% of viruses.

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Section: Discussionsupporting

confidence: 75%

“…Fecal coliforms were isolated at concentrations varying from 26.6 x 106 to 2.2 x 108 per liter, which are levels commonly encountered in other geographic areas (4,8,14). Fecal coliform concentration peaks were observed at the same times as those of viruses, noon and midnight.…”

Section: Resultsmentioning

confidence: 81%