As a collaborative effort between MWH and the University of Houston, the two primary
objectives of this research were to:
demonstrate the long-term performance of conventional ion-exchange technology for
perchlorate removal; and,
evaluate three disparate alternatives (chemical, biological, electrolytic) for brine treatment
and reuse.
While addressing these objectives, the underlying requirement of the pilot-scale system was to
ensure that the treated water perchlorate concentration remained below the California
Department of Public Health Services perchlorate Advisory Action Level of 4 ug/L.
Designed, constructed and installed within MWH's Mobile Water Treatment Pilot Trailer, the
pilot plant included two parallel ion-exchange columns (clear PVC) that could be operated
independently in either co- or counter-current exhaustion and regeneration. For
the purposes of this study, the columns were operated in a counter-current mode with up-flow
exhaustion and down-flow regeneration. Screens were inserted at the top and bottom of each
ion-exchange column to contain the resin in the column during the exhaustion and regeneration
modes. The treated water was collected in a clearwell and was also used for rinse water after
regeneration. The spent brine solution was either wasted or collected in a holding tank to be fed
to the brine treatment system. The treated brine was then returned to the regeneration (sweet)
brine tank. Includes table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 350 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 7 |
| Published : | 11/02/2003 |
