par Servais, Pierre ;Cauchi, B.;Billen, Gilles
Référence Water science and technology, 14, 2, page (223-231)
Publication Publié, 1994
Article révisé par les pairs
Résumé : An interesting alternative introduced in some treatment plants consists of using GAC filtration without regeneration, taking benefit of the activity of microbial communities colonizing the GAC particle (AWWA, 1981; Bablon et al., 1986). In fact, this biological filtration has the advantage of specifically removing biodegradable compounds - the most undesirable fraction of DOC - in order to avoid bacterial regrowth in distribution networks. In order to improve the understanding of the processes involved in biological filtration and to derive guidelines for a rational management of these filters, extensive studies were conducted in the three plants of the Syndicat des Eaux d'Ile de France, located in the Parisian suburbs (Choisy-le-Roi, Mery-sur-Oise, Neuilly-sur-Marne). Experimental pilots and full scale filters were used for these studies. The first objective of this paper is to summarize the major data gained during these studies on biological GAC filters (Servais et al., 1991a & b, 1992a; Bouillot et al., 1992), and the second one is to present a model of biological filters functioning used in drinking water treatment (the Chabrol model), which has been developed to relate the macroscopic functioning of biological filters used for eliminating dissolved organic matter in drinking-water treatment, to the kinetics of the basic microbiological processes involved (Billen et al., 1992).