With the approach of the Stage 2 D/DBP Rule and its requirement for compliance with
locational running annual average (LRAA) disinfection byproduct (DBP) maximum
contaminant levels, it is necessary for many utilities to take a closer look a DBP control
in the distribution system. Salt Lake City Public Utilities Department (SLCPUD) has
undertaken a series of pilot studies at Parleys Treatment Plant to determine what
technologies would be best suited to this end. Of the three treatment plants owned and
operated by SLCPUD, Parleys is the major contributor to distribution system DBPs. The
first study, described in this paper, tested the capabilities of conventional enhanced
coagulation treatment to reduce DBP levels. Future studies are planned to look at other
technologies.
It is difficult to know what direction future DBP regulations will take. At one point it
seemed likely that they would push toward continual lowering of maximum contaminant
levels for total trihalomethanes (TTHM) and haloacetic acid 5 (HAA5) to the 40 µg/L
and 30 µg/L marks respectively. Today it seems more likely that future regulations will
focus on individual DBP species within TTHM and HAA5. The purpose of this pilot
study was to test the limits of conventional treatment, and the focus was on TTHM and
HAA5, which are currently regulated. There will be some discussion of the individual
DBP species in the results, but the goals of the study were set with respect to TTHM and
HAA5. Includes 4 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 410 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 15 |
| Published : | 11/01/2005 |
