Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A High‐Volume Sampling Method for Total Coliform and E. Coli
To better define the presence of coliform bacteria and Escherichia coli in drinking water distribution systems, a capsule filter sample method was developed for collecting volumes larger than the conventional 100‐mL sample. Bench studies indicated this method was capable of consistent detection of the presence of low concentrations of seeded total coliforms and E. coli in 20‐L sample volumes. Field trials in distribution systems were performed at three utilities. In 252 sample sets, the 20‐L method detected total coliform in 18 samples, but in only two were the corresponding 100‐mL samples total coliform‐positive. E. coli was not detected by either sample method at any location. These results indicate that distribution water quality may be better characterized using this high‐volume method and suggest that the presence of total coliform positives is a function of sample volume rather than an indicator of water quality.
A High‐Volume Sampling Method for Total Coliform and E. Coli
To better define the presence of coliform bacteria and Escherichia coli in drinking water distribution systems, a capsule filter sample method was developed for collecting volumes larger than the conventional 100‐mL sample. Bench studies indicated this method was capable of consistent detection of the presence of low concentrations of seeded total coliforms and E. coli in 20‐L sample volumes. Field trials in distribution systems were performed at three utilities. In 252 sample sets, the 20‐L method detected total coliform in 18 samples, but in only two were the corresponding 100‐mL samples total coliform‐positive. E. coli was not detected by either sample method at any location. These results indicate that distribution water quality may be better characterized using this high‐volume method and suggest that the presence of total coliform positives is a function of sample volume rather than an indicator of water quality.
A High‐Volume Sampling Method for Total Coliform and E. Coli
Hargy, Thomas M. (Autor:in) / Rosen, Jeffrey (Autor:in) / Lechevallier, Mark (Autor:in) / Friedman, Melinda (Autor:in) / Clancy, Jennifer L. (Autor:in)
Journal ‐ American Water Works Association ; 102 ; 79-86
01.03.2010
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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