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AWWA WQTC64179
- Optimization of Biological Treatment of Perchlorate and Nitrate-Laden Ion Exchange Residuals
- Conference Proceeding by American Water Works Association, 11/01/2006
- Publisher: AWWA
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The biological brine treatment was evaluated through both bench- and pilot-scale studies usingboth acetate and hydrogen as electron donors. Pilot-scale demonstration using acetate-fedsequencing batch reactor (SBR) showed that the process was able to consistently reduceperchlorate and nitrate concentrations in the spent brine (6% NaCl) 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 cycles. Bench-scale testing with 100 mg/L perchlorateand 100 mg/L nitrate laden synthetic brine showed that hydrogen-fed membrane biofilm reactor(MBfR) could demonstrate about 100% nitrate reduction and about 60% perchlorate reduction. Includes 20 references, tables, figures.
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