离子交换（IX）树脂可以将地下水中的硝酸盐浓度降低到非常低的水平 水平；然而，含有高硝酸盐浓度的再生盐水会造成污染 处理问题。这项研究调查了氢营养（利用氢） 再生盐水中硝酸盐的生物还原。耐盐反硝化批 从废水处理厂的反硝化阶段富集培养物，然后 马萨诸塞州科德角和死海的海洋沉积物。文化是 接种到硝酸盐营养培养基中，添加和不添加NaCl，以氢为底物 唯一的电子供体。耐盐培养物能反硝化800mg/L NO₃-N 12.6 g/L NaCl至200 mg/L NO₃-N的存在。将培养物接种到两个培养基中 不同的中空纤维膜生物反应器（HFMBs），一个喂食50 mg/L NO₃- N没有 添加NaCl（非盐水），另一只喂食600 mg/L NO₃-N和12.5 g/L NaCl（盐水）。 非盐水HFMB能够持续将硝酸盐浓度降低至8 mg/L以下 当pH值和生物污垢得到控制时，水力停留时间（HRT）为5小时。这个 盐水HFMB仅在HRT为53小时时实现部分脱氮。现在的 研究的重点是批量HFMB中盐水的处理。包括11个参考文献、图表。

Ion exchange (IX) resins can reduce nitrate concentrations in groundwater to very low levels; however, regeneration brines containing high nitrate concentrations pose a disposal problem. This research investigated hydrogenotrophic (hydrogen utilizing) biological reduction of nitrate in regenerant brines. Salt tolerant denitrifying batch cultures were enriched from the denitrification stage of a wastewater treatment plant and marine sediments from Cape Cod, Massachusetts and the Dead Sea. The cultures were inoculated into nitrate nutrient media, with and without added NaCl, with hydrogen as the sole electron donor. The salt tolerant cultures were able to denitrify 800 mg/L NO₃-N in the presence of 12.6 g/L NaCl to 200 mg/L NO₃-N. The cultures were inoculated into two different hollow fiber membrane bioreactors (HFMBs), one fed 50 mg/L NO₃-N with no added NaCl (non-brine) and the other fed 600 mg/L NO₃-N with 12.5 g/L NaCl (brine). The non-brine HFMB was able to consistently reduce nitrate to less than 8 mg/L at a hydraulic residence time (HRT) of 5 hours when pH and biofouling were controlled. The brine HFMB only achieved partial denitrification at an HRT of 53 hours. Current research is focused on treatment of the brine in a batch HFMB. Includes 11 references, figures.