This study evaluated the impact of pre-ozonation before enhanced coagulation and
post-ozonation following enhanced coagulation in controlling halogenated disinfection byproduct
formation in drinking water. Raw waters from utilities representing each of the nine
elements of the enhanced coagulation matrix were examined. All testing was completed
using bench-scale, batch experimental procedures. The various waters were analyzed for
turbidity, total organic carbon, dissolved organic carbon, ultraviolet absorbance,
trihalomethane formation potential and haloacetic acid formation potential. The results
indicated that formation of trihalomethanes and haloacetic acids following enhanced
coagulation decreased with both pre- and post-ozonation applications relative to the
decreases observed by enhanced coagulation alone. The amount of trihalomethanes and
haloacetic acids formed were lower for the waters that were pre-ozonated and then
coagulated compared to those that were coagulated first and then ozonated. Strong
correlations between disinfection byproduct formation potentials and ultraviolet absorbance
at 254 nm were observed for enhanced coagulation both with and without pre- and post-ozonation. Includes 16 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 350 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 17 |
| Published : | 06/15/2003 |
