The objective of the study described in this article was to determine the effect of backwashing on the efficiency of first-stage sand-biological activated carbon (BAC) filters. Specifically, study procedures: compared ammonia, biodegradable dissolved organic carbon (BDOC), aldehyde, and oxalate concentration profiles in first-stage sand-BAC filters before and after filter backwash, and they assessed possible changes in rates of removal throughout the filtration run; compared the efficiencies of a first-stage sand-BAC filter and a first-stage sand-anthracite filter operated under similar hydraulic conditions, both of which achieved low effluent turbities below 0.5 ntu; and, evaluated how efficiently first-stage sand-BAC filters removed biodegradable compounds by comparing concentration profiles in first-stage sand-BAC filters and second-stage BAC filters. Includes 29 references, tables, figures.
| Edition : | Vol. 90 - No. 1 |
| File Size : | 1
file
, 990 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 12 |
| Published : | 01/01/1998 |
