AWWA WQTC62368

AWWA WQTC62368 Characterization of the Bacterial Population in RO Distribution Systems and Their Ability to Form Biofilms on Pipe Surfaces
Conference Proceeding by American Water Works Association, 11/01/2005

Mac Aree, Brenda A.; Clancy, J.L.; O'Neill, G.L.; Lead, J.R.

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A pilot study was conducted over a 14-month period comparing the type and quantityof bacteria present in the Water Authority-Cayman (WAC), Cayman Islands, distribution system using a combination of heterotrophic plate count (HPC)culture methods and fatty ester methyl ester (FAME) analysis techniques. The studywas divided into two distinct phases: in the first phase HPC bacteria in the bulkwaterwere isolated from inlet (feedwater) to outlet (treated distribution water) and furthercharacterized down to genus or species depending on an available database match,a pipe-loop system was constructed for the second phase of the study to examinethe rate of biofilm growth on different pipe surfaces (PVC, ductile iron, steel, PE,brass, copper) and to compare the type of biofilm organisms to those in the bulk fluid. Includes 8 references, tables, figures.