Full Description

Purolite A-850 polyacrylic resin was chosen for this test, a run length of 255 bed volumes wasselected. Counter-current regeneration of the exhausted resin using a 6 percent NaCl solutionwas performed. Complete removal of nitrate (NOsub3/subsup-/sup, sulfate (SOsub4/subsup-/sup, bicarbonate(HCOsub3/subsup-/sup) and perchlorate (ClOsub4/subsup-/sup) was achieved in 13 BV. Based on this, a partial regeneration of21 lbs/ftsup3/sup was selected for the resin during baseline testing. The biological brine treatmentsystem was housed in a sequencing batch reactor (SBR) and demonstrated that the process wasable to consistently reduce perchlorate and nitrate concentrations in the spent brine (6 percentNaCl) to below treatment goals (ClOsub4/subsup-/sup 100 g/L and NOsub3/subsup-/sup 0.5 mg/L) for 20 (re)cycles.Results for 20 cycles of exhaustion and regeneration of resin using treated brine showed that theIX process could successfully remove perchlorate and nitrate. Includes 20 references, tables, figures.

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Edition: Vol. - No. Published: 06/01/2006 Number of Pages: 11File Size: 1 file , 280 KB