AWWA WQTC65984

In the biological activated carbon (BAC) filters at the water treatment plant Weesperkarspel ofWaternet, water cycle company for Amsterdam and surrounding areas, rapid clogging takes place.A pilot plant study was carried out to study the processes responsible for the clogging. Severalhypotheses were tested, including clogging due to biomass and calcium carbonate particlesorigination from the pellet softening. Results show that the clogging is a combination of severalfactors. Clogging by biomass results in the formation of a cake layer which accounts for themajority of the pressure build-up. The data collected during the pilot plant study were used tocalibrate and validate a model for predicting the pressure drop in the filters. The model predicts thefilter run time based on the influent water quality of the BAC filters. The model can be used tooptimize the backwash sequence, resulting in a reduction of the use of backwash water. Includes 19 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2007

Number of Pages:

11

File Size:

1 file , 260 KB