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首页> 外文会议>Membrane/Separations Technology Planning Conference; 20031201-20031202; Newton,MA; US >DRINKING WATER DENITRIFICATION USING HOLLOW FIBER MEMBRANE BIOREACTORS
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DRINKING WATER DENITRIFICATION USING HOLLOW FIBER MEMBRANE BIOREACTORS

机译：使用中空纤维膜生物反应器进行饮用水脱硝

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The performance of hydrogenotrophic and heterotrophic hollow fiber membrane bioreactors (HFMBs) was investigated for biological denitrification of nitrate (NO_(3~-)) contaminated drinking water. In the hydrogenotrophic HFMB, H_2 flows through the lumen of the hydrophobic microporous hollow fibers. Nitrate contaminated water circulates on the shell side of the reactor. Advantages of the hydrogenotrophic HFMB include high gas transfer rates, high biomass densities and bubbless operation. In the heterotrophic HFMB, NO_(3~-) contaminated water flows through the lumen of the hollow fibers. NO_(3~-) is utilized by a heterotrophic population circulating on the shell side of the reactor. The microporous membranes provide a high NO_(3~-) permeability, while separating the microbial population from the water being treated. This eliminates the possibility of carryover of microbial biomass into the product water and allows for independent optimization of each phase of the system. Both reactors achieved high (>97%) NO_(3~-) removal efficiencies even at very high (up to 200 mg NO_(3~-)-N L~(-1)) influent concentrations. Denitrification rates of up to 770 g NO_(3~-)-N m~(-3) d~(-1) were achieved for the hydrogenotrophic HFMB and 470 g NO_(3~-)-N m~(-3) d~(-1) for the heterotrophic HFMB. Water quality testing showed a significant increase in turbidity, TOC and DOC in the hydrogenotrophic HFMB, possibly due to leaking microbial products and sloughed biomass. In the heterotrophic HFMB, approximately 8% of the added methanol partitioned into the product water through the membranes.
机译：研究了氢营养型和异养型中空纤维膜生物反应器（HFMBs）对硝酸盐（NO_（3〜-））污染的饮用水进行生物脱氮的性能。在氢营养型HFMB中，H_2流过疏水性微孔中空纤维的内腔。被硝酸盐污染的水在反应器的壳侧循环。氢营养型HFMB的优势包括高气体传输速率，高生物质密度和气泡运行。在异养HFMB中，被NO_（3-）污染的水流过中空纤维的内腔。 NO_（3-）被在反应器壳侧循环的异养群体利用。微孔膜提供高的NO_（3〜-）渗透性，同时使微生物种群与被处理水分离。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。即使在非常高的进水浓度（高达200 mg NO_（3〜-）-N L〜（-1））下，两个反应器都实现了高（> 97％）的NO_（3-）去除效率。氢营养HFMB和470 g NO_（3〜-）-N m〜（-3）的反硝化率高达770 g NO_（3〜-）-N m〜（-3）d〜（-1）异养HFMB的d〜（-1）。水质测试显示，氢营养型HFMB的浊度，TOC和DOC显着增加，这可能是由于微生物产品泄漏和生物质下降所致。在异养HFMB中，约8％的添加甲醇通过膜分配到产物水中。

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