研究了两种实验室规模的中空纤维膜生物反应器（HFMBs）对硝酸盐（NO3-）污染饮用水的生物脱氮性能。同时使用氢营养型HFMB和异养型HFMB。在亲水性HFMB中，H2流经疏水性微孔中空纤维的内腔，扩散到附着的生物膜上。硝酸盐污染的水在反应堆壳侧循环。氢被氢营养群体利用，为传质创造动力。氢营养HFMB的优点包括高气体传输速率、高生物量密度和无泡操作。 在异养HFMB中，NO3污染的水流经微孔中空纤维的内腔，NO3-通过膜孔扩散。NO3-被在反应器壳侧循环的异养菌群利用，为传质产生驱动力。微孔膜提供了较高的硝酸盐渗透性，同时将微生物种群与待处理的水分离。这消除了将微生物生物量带入产品水中的可能性，并允许对系统的每个阶段进行独立优化。两个反应堆都实现了高浓度（gt97%）NO3- 即使在非常高的进水NO3-浓度下，去除效率也很高。水质测试显示，富氢HFMB中的浊度、总有机碳（TOC）和溶解有机碳（DOC）显著增加，这可能是由于微生物产品泄漏和生物量下降所致。在异养HFMB中，大约8%的添加乙醇通过膜分配到产品水中。包括36个参考文献、表格、图表。

The performance of two laboratory-scale hollow fiber membrane bioreactors (HFMBs)was investigated for biological denitrification of nitrate (NO3-) contaminateddrinking water. Both a hydrogenotrophic HFMB and a heterotrophic HFMB were used.In the hydrogenotrophic HFMB, H2 flows through the lumen of the hydrophobicmicroporous hollow fibers and diffuses to the attached biofilm. Nitratecontaminated water circulates on the shell side of the reactor. H2 is utilized bythe hydrogenotrophic population creating a driving force for mass transfer.Advantages of the hydrogenotrophic HFMB include high gas transfer rates, highbiomass densities and bubbless operation. In the heterotrophic HFMB, NO3-contaminated water flows through the lumen of the microporous hollow fibers andNO3- diffuses through the pores of the membrane. NO3- is utilized by theheterotrophic population circulating on the shell side of the reactor, creating adriving force for mass transfer. The microporous membranes provide a high nitratepermeability, while separating the microbial population from the water beingtreated. This eliminates the possibility of carryover of microbial biomass intothe product water and allows for independent optimization of each phase of thesystem. Both reactors achieved high (>97%) NO3- removal efficiencies even at veryhigh influent NO3- concentrations. Water quality testing showed a significantincrease in turbidity, total organic carbon (TOC) and dissolved organic carbon(DOC) in the hydrogenotrophic HFMB, possibly due to leaking microbial productsand sloughed biomass. In the heterotrophic HFMB, approximately 8% of the addedmethanol partitioned into the product water through the membranes. Includes 36 references, table, figures.