Processes currently used to treat resources from Brittany, especially the ones in Rennes, are
not efficient enough for a significant removal of dissolved natural organic matter. Trials were
carried out with powdered activated carbon (PAC) and settled water which indicated good
removal rates. Hence a pilot unit based on the coupling of membranes and PAC was set up in
the drinking water treatment plant of Rennes Villejean, France. On one hand, physical-chemical
parameters (DOC, UV absorbance, SDI.) enable us to characterize the dissolved organic
matter removal, and on the other hand, a continuous data acquisition was set up to get
hydraulic parameters. Two main periods of pilot experiments were carried out using three
identical reactors in parallel. Includes 6 references, tables, figures.