饮用水中硝酸盐含量高是高铁血红蛋白血症的主要原因，证据表明 硝酸盐摄入与癌症之间的潜在联系。水源中的硝酸盐浓度已经降低 在发达国家稳步上升。这是物理和化学处理的一个有吸引力的替代品 去除硝酸盐是生物反硝化。自养反硝化是推荐的 由于与异养生物相关的下游不稳定性问题，异养反硝化 反硝化。在这项研究中，氢营养反硝化菌与死细菌一起使用- 端部凹陷 纤维膜生物反应器（HFMB）。HFMB增加了H2的传质，从而提高了反应温度 脱硝率和消除任何与氢气相关的燃烧问题。此外，HFMB支持 高生物量密度。该项目的目标是比较脱氮率和水 与之前的研究质量保持一致，控制生物污染，并调查氢气分压和 混合营养代谢对反硝化速率的影响。该研究在24小时内实现了反硝化 以及与之前研究相当的反硝化速率。 生物膜的控制 氮气剪切提高了平均脱氮速率和出水浊度TOC/DOC， 异养平板计数。混合营养代谢导致平均体重略有增加 自养环境中的反硝化速率。然而，与有机污染物相关的担忧 碳源携带对混合营养概念的实用性提出了质疑。 包括28个参考文献、表格和图表。

High nitrate levels in drinking water are the primary cause of methemoglobinemia, and evidence points to a potential linkage between nitrate intake and cancer. The concentration of nitrate in water sources has steadily risen in developed countries. An attractive alternative to physical and chemical treatment for removing nitrate is biological denitrification. Autotrophic denitrification is recommended over heterotrophic denitrification because of downstream instability issues associated with heterotrophic denitrification. In this research, hydrogenotrophic denitrifiers were used along with a dead-end Hollow Fiber Membrane Bioreactor (HFMB). The HFMB increased the mass transfer of H2 to improve the denitrification rates and negate any combustion issues affiliated with H2 gas. Also, the HFMB supported a high biomass density. The objectives of this project were to compare the denitrification rates and water quality with previous research, control biofouling, and investigate effects of partial H2 pressure and mixotrophic metabolism on denitrification rates. The research resulted in denitrification within 24 hours of startup, along with denitrification rates comparable to previous research. Controlling the biofilm by shearing with N2 gas improved both the average denitrification rates and effluent turbidity, TOC/DOC, and heterotrophic plate counts. The mixotrophic metabolism resulted in a slight increase in average denitrification rate over an autotrophic environment. However, the concerns associated with an organic carbon source carryover questions the practicality of the mixotrophic concept. Includes 28 references, tables, figures.