AWWA WQTC62504

With the approach of the Stage 2 D/DBP Rule and its requirement for compliance withlocational running annual average (LRAA) disinfection byproduct (DBP) maximumcontaminant levels, it is necessary for many utilities to take a closer look a DBP controlin the distribution system. Salt Lake City Public Utilities Department (SLCPUD) hasundertaken a series of pilot studies at Parleys Treatment Plant to determine whattechnologies would be best suited to this end. Of the three treatment plants owned andoperated by SLCPUD, Parleys is the major contributor to distribution system DBPs. Thefirst study, described in this paper, tested the capabilities of conventional enhancedcoagulation treatment to reduce DBP levels. Future studies are planned to look at othertechnologies.It is difficult to know what direction future DBP regulations will take. At one point itseemed likely that they would push toward continual lowering of maximum contaminantlevels for total trihalomethanes (TTHM) and haloacetic acid 5 (HAA5) to the 40 µg/Land 30 µg/L marks respectively. Today it seems more likely that future regulations willfocus on individual DBP species within TTHM and HAA5. The purpose of this pilotstudy was to test the limits of conventional treatment, and the focus was on TTHM andHAA5, which are currently regulated. There will be some discussion of the individualDBP species in the results, but the goals of the study were set with respect to TTHM andHAA5. Includes 4 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2005

Number of Pages:

15

File Size:

1 file , 410 KB