This study investigated the development of nitrification with pilot-scale
biological filters using anthracite/sand and granular activated carbon (GAC)/sand filter media. Sampling
ports on the column walls allowed us to examine removal of various water quality
constituents over the media depth. During these experiments, sample flow did not
exceed 5% of the total flow rate through the filter. Ammonia, nitrite, nitrate,
carboxylic acids (CAAs), bromate, and trihalomethanes (THMs) were monitored throughout the
depth of media.
Results showed that CAAs were removed in the upper portion of the media bed
while the removal of ammonia was more distributed throughout the bed. Full
conversion of ammonia to nitrate was observed in each of the filters. Bromate
removal was witnessed within the filters but ambient influent concentrations were
less than 15 µg/L. THMs removal was experienced within the filter; however, the
total THMs concentration was less than 16 µg/L. Ammonia removal was not
impacted during filter ripening. Includes 20 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 840 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Published : | 11/01/2009 |
