Purolite A-850 polyacrylic resin was chosen for this test, a run length of 255 bed volumes was
selected. Counter-current regeneration of the exhausted resin using a 6 percent NaCl solution
was performed. Complete removal of nitrate (NO<sub>3</sub><sup>-</sup>, sulfate (SO<sub>4</sub><sup>-</sup>, bicarbonate
(HCO<sub>3</sub><sup>-</sup>) and perchlorate (ClO<sub>4</sub><sup>-</sup>) was achieved in 13 BV. Based on this, a partial regeneration of
21 lbs/ft<sup>3</sup> was selected for the resin during baseline testing. The biological brine treatment
system was housed in a sequencing batch reactor (SBR) and demonstrated that the process was
able to consistently reduce perchlorate and nitrate concentrations in the spent brine (6 percent
NaCl) to below treatment goals (ClO<sub>4</sub><sup>-</sup> < 100 µg/L and NO<sub>3</sub><sup>-</sup> < 0.5 mg/L) for 20 (re)cycles.
Results for 20 cycles of exhaustion and regeneration of resin using treated brine showed that the
IX process could successfully remove perchlorate and nitrate. Includes 20 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 280 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 06/01/2006 |
