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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects
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Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects

机译：混合好氧反硝化联盟去除贫营养水库水中的氮：影响因素和固定化效果

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摘要

Nitrogen pollution in reservoirs has received increasing attention in recent years. Although a number of aerobic denitrifying strains have been isolated to remove nitrogen from eutrophic waters, the situation in oligotrophic water environments has not received significant attention. In this study, a mixed aerobic denitrifying consortium screened from reservoir samples was used to remove nitrogen in an oligotrophic denitrification medium and actual oligotrophic source water. The results showed that the consortium removed 75.32% of nitrate (NO3−-N) and 63.11% of the total nitrogen (TN) in oligotrophic reservoir water during a 24-h aerobic cultivation. More initial carbon source was helpful for simultaneous removal of carbon and nitrogen in the reservoir source water. NO3−-N and TN were still reduced by 60.93% and 46.56% at a lower temperature (10 °C), respectively, though the rates were reduced. Moreover, adding phosphorus promoted bacterial growth and increased TN removal efficiency by around 20%. The performance of the immobilized consortium in source water was also explored. After 6 days of immobilization, approximately 25% of TN in the source water could be removed by the carriers, and the effects could last for at least 9 cycles of reuse. These results provide a good reference for the use of aerobic denitrifiers in oligotrophic reservoirs.
机译：近年来，水库中的氮污染受到越来越多的关注。尽管已经分离出许多好氧反硝化菌株以从富营养化水中去除氮，但在贫营养化水环境中的状况尚未引起足够的重视。在这项研究中，从储层样品中筛选出的混合好氧反硝化联合体用于去除贫营养反硝化介质和实际贫营养源水中的氮。结果表明，在24小时有氧培养过程中，财团去除了贫营养油藏水中的硝酸盐（NO3 - -N）75.32％和总氮（TN）63.11％。更多的初始碳源有助于同时去除储层源水中的碳和氮。尽管在较低的温度（10℃）下，NO3 - -N和TN仍分别减少了60.93％和46.56％，但比例有所降低。此外，添加磷可促进细菌生长，并将TN去除效率提高约20％。还研究了固定财团在水源中的性能。固定6天后，载体可以去除原水中约25％的TN，并且效果至少可持续9个重复使用周期。这些结果为有氧反硝化剂在贫营养油藏中的使用提供了很好的参考。

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