Electrodialysis reversal (EDR) was pilot tested on moderate total dissolved solids (TDS), high
silica groundwater with elevated levels of fluoride and arsenic at Fort Irwin, California. During
75 days of continuous testing, results demonstrated that with minimal pretreatment, EDR was
capable of producing water that consistently met the Fort Irwin water quality goals and State of
California water quality requirements. The pilot unit was optimized to maximize feedwater
recovery while staying within safe operating parameters relative to applied voltage and sparingly
soluble salt supersaturation. A scale inhibitor and hydrochloric acid were added at low doses to
the concentrate recycle loop to enhance recovery. Activated Alumina, regenerable, (AAR) was
also tested at Fort Irwin. Results indicated that this technology was capable of removing arsenic
and fluoride; however, the process was heavily impacted by high concentrations of silica in the
Fort Irwin source water. This article presents the results of AAR and EDR pilot testing, which
was performed to help select and design a full-scale facility for the Fort Irwin new
6-million-gallon-per-day (mgd) water treatment plant. Includes 3 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 480 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 17 |
| Published : | 03/01/2007 |
