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Microbial Activity in GAC Filters at the Choisy-le-Roi Treatment Plant

par Servais, Pierre ;Billen, Gilles ;Ventresque, Claire;Bablon, G.
Référence Journal - American Water Works Association, 83, 2, page (62-68)
Publication Publié, 1991-02-01

Article révisé par les pairs

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Résumé :

To maintain the biological stability of drinking water during distribution in large, complex networks, high standards have to be met--namely, low bacterial densities and low levels of biodegradable organic carbon. Second-stage granular activated carbon (GAC) filtration (without regeneration of carbon) is used for this purpose at the Choisy-le-Roi, Paris, France, treatment plant. Effective removal of dissolved organic carbon has been observed with such filtration mainly because of a reduction in the biodegradable organic carbon. To study the microbial processes involved in this removal, new methods based on the use of radio-labeled tracers have been developed in order to measure the bacterial biomass and activity associated with GAC.