In early July 2003, Carollo Engineers initiated a six-month pilot study at the Castaic Lake Water
Agency (Santa Clarita, California). The ultimate goal of this project was to demonstrate the efficacy of
fixed-bed biological treatment for perchlorate removal from Saugus aquifer water (i.e., show
consistent removal of perchlorate to below the method detection limit of 4 mg/L). Specific
objectives of the project were to:
verify that sufficient perchlorate-reducing biological activity can be developed in the pilot-scale
reactors using microorganisms indigenous to the Saugus aquifer;
develop full-scale design criteria for empty-bed contact time (EBCT), backwashing
procedures, electron donor (acetic acid) addition, and nutrient addition; evaluate the robustness of the fixed-bed biological process with respect to system upsets,
such as electron donor feed failure, process shut-downs, and spikes in the feedwater oxidant
concentrations; and,
determine post-treatment requirements for the fixed- and fluidized-bed perchlorate removal
processes (i.e., characterize process effluent quality). Results demonstrated that a perchlorate-reducing, fixed-bed biological reactor can be acclimated
using organisms indigenous to the Saugus aquifer, that perchlorate can be removed to below
detection using reasonable contact times, and that effluent water from these processes is of fairly
high quality. Ultimately, the results of this project will be used to evaluate the feasibility and
costs associated with treating perchlorate-laden Saugus aquifer water using both fixed- and
fluidized-bed biological reactors.
| Edition : | Vol. - No. |
| File Size : | 1
file |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 4 |
| Published : | 11/15/2004 |
