• AWWA WQTC59007
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AWWA WQTC59007

  • Biological Activated Carbon Filtration: Pilot Experiments in the Netherlands
  • Conference Proceeding by American Water Works Association, 11/02/2003
  • Publisher: AWWA

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Pilot plant studies both on riverbank filtrate and surface water were performed to gain knowledge onbiodegradation processes in bilogical activated carbon (BAC) and its interaction with adsorption processes.The research in the pilot plant treating riverbank filtrate focuses on the removal of pesticides. BACfilters were more effective in removing pesticides than granular activated carbon (GAC) filters. This is probably caused byreduced competition with dissolved organic carbon (DOC) as a result of biodegradation of DOC.The research in the pilot plant treating surface water focuses on biodegradation of organic matter.Biomass build-up measured by adenosine triphosphate (ATP) on carbon lasted 9 months, which is slower than the 2 monthsstart-up time of rapid and slow sand filters. Biodegradation decreases with bed depth due to thedecrease in the concentration of biodegradable compounds. Oxygen consumption did not correlatewell with assimilable organic carbon (AOC) removal, DOC removal and ATP on carbon. This is probably due to the effects ofsimultaneous adsorption. It is suggested that the efficiency of ATP increases with increasingtemperature. Includes 6 references, tables, figures.

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