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Annual report Chair on Drinking Water Engineering 2007 - TU Delft

Annual report Chair on Drinking Water Engineering 2007 - TU Delft

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MODELLING OF BIOLOGICAL ACTIVATED CARBON FILTRATION<br />

Research objectives<br />

�������������������������������������������������������������������������������������������������������������trati<strong>on</strong><br />

in drinking water treatment. The model includes adsorpti<strong>on</strong> and biodegradati<strong>on</strong> processes and should<br />

be able to predict the removal of organic matter and pesticides.<br />

Project outline<br />

Introducti<strong>on</strong><br />

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capacity result in lower solid-phase c<strong>on</strong>centrati<strong>on</strong>s of organic matter <strong>on</strong> activated carb<strong>on</strong>. The reduced solid-<br />

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run times for pesticides.<br />

Approach<br />

��������������������������������������������������������������������������������������������������������������age<br />

of the project a measurement method for biomass <strong>on</strong> activated carb<strong>on</strong> was developed and the dominant<br />

bacteria species were determined and characterized. Laboratory experiments were performed to determine the<br />

effect of oxidati<strong>on</strong> <strong>on</strong> the adsorpti<strong>on</strong> characteristics of the organic matter. This provided data for model calibrati<strong>on</strong>.<br />

Pilot plant studies <strong>on</strong> ground and surface water were performed to provide data for model validati<strong>on</strong>.<br />

Results<br />

Laboratory experiments showed that due to oxidati<strong>on</strong> and biodegradati<strong>on</strong> the solid-phase c<strong>on</strong>centrati<strong>on</strong>s of<br />

dissolved organic matter reduce up to 50% of the original values. Pesticide spiking experiments at a c<strong>on</strong>cen-<br />

Figure 1. Atrazine breakthrough in GAC and BAC at empty bed c<strong>on</strong>tact times of 5 min and 10 min<br />

38 <str<strong>on</strong>g>Annual</str<strong>on</strong>g> <str<strong>on</strong>g>report</str<strong>on</strong>g> DWE <strong>2007</strong>

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