A 12-month assimilable organic carbon (AOC) survey of 64 conventional water treatment
plants was conducted to assess mechanisms affecting effluent AOC levels. The effect of
conventional treatment steps (i.e., oxidation, coagulation, filtration, disinfection) on the
formation or removal of biodegradable organic matter (BOM) was also investigated at six of
the sites. BOM levels were increased or decreased by various factors including the type of
filter media, the type of coagulant used, and the level of watershed protection of the plant's
source water. Systems that prechlorinated and used anthracite/sand filtration generally had
low removal of dissolved organic carbon (DOC) and biodegradable DOC (BDOC) and increases
in AOC levels through the treatment process. Systems combining prechlorination and granular
activated carbon (GAC) filtration showed increases in AOC in the settled water but removal
of AOC through filtration. DOC and BDOC levels were generally reduced by conventional
sand/GAC filtration. Includes 41 references, tables, figures.
| Edition : | Vol. 94 - No. 6 |
| File Size : | 1
file
, 260 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 12 |
| Published : | 06/01/2002 |
