AWWA DSS69209

This powerpoint presentation begins by providing a brief overview of biofilms in distribution systems, and advantages of the biofilm habit. Cellular changes in biofilms are presented, along with the biofilm cycle, early colonization, effects of pipe material, disinfectant residual, changing disinfectant regimes, community expansion, mature biofilm, competition and cooperation, communication and blocking, predation, pathogens persisting in protozoa, dispersal, coliforms and E.coli, corrosion, nitrification and denitrification, and potential risks from biofilm. Includes tables.