新型导电填料加速形成厌氧氨氧化生物膜及脱氮效能研究
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X703

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国家自然科学基金(52270134);山西省应用基础研究(青年科技)项目(202203021212299);太原科技大学科研启动(20222047)


Accelerate formation of Anammox biofilm using new conductive fillers and its nitrogen removal efficiency
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    摘要:

    厌氧氨氧化菌(AnAOB)在实际脱氮工艺中持留能力差,是制约该技术规模化应用的主要技术瓶颈之一。相较与传统生物填料,高温热解轮胎制备成具有导电特性的新型生物填料,不仅可以回收利用固定废弃物,而且能够实现加速AnAOB形成生物膜和提高脱氮效率的双重作用。实验结果表明,800℃最适合用于热解轮胎填料,同时具备更高的电导率和更有利于固定微生物生长特性。相较于单独Anammox组,Anammox+导电填料的NH4+-N、NO2--N和TN平均去除率比单独Anammox组分别提升了9.12%、13.20%和15.69%,且明显高于聚丙烯(PP)填料的强化效果。Q-PCR分析结果表明,添加导电填料能够促使脱氮菌种丰度增加,其中AnAOB、亚硝酸盐还原菌和硝酸盐还原菌分别增长了50.21%、69.70%和145.59%。该新型导电填料技术的研发,可为Anammox技术推广提供新的思路和数据基础。

    Abstract:

    Anaerobic ammonia oxidizing bacteria (AnAOB) have poor retention capacity in actual denitrification processes, which is one of the main technical bottlenecks restricting the large-scale application of this technology. Compared with traditional biological fillers, high-temperature pyrolysis tires can be used to prepare a new type of biological filler with conductive properties. This not only recycles fixed waste, but also achieves a dual effect of accelerating the formation of biofilm in AnAOB and improving denitrification efficiency. The experimental results indicate that 800 ℃ is the most suitable for pyrolysis tire fillers, while having higher electrical conductivity and more favorable characteristics for fixed microbial growth. Compared to the Anammox group alone, the average removal rates of NH4+-N, NO2--N, and TN with Anammox+conductive filler increased by 9.12%, 13.20%, and 15.69%, respectively, compared to the Anammox group alone, and were significantly higher than the strengthening effect of polypropylene (PP) filler. The Q-PCR analysis results showed that adding conductive fillers can promote an increase in the abundance of denitrifying bacteria, with AnAOB, nitrite reducing bacteria, and nitrate reducing bacteria increasing by 50.21%, 69.70%, and 145.59%, respectively. The development of this new conductive filler technology can provide new ideas and data basis for the promotion of Anammox technology.

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杨海龙,马少杰,王卓,等. 新型导电填料加速形成厌氧氨氧化生物膜及脱氮效能研究[J]. 科学技术与工程, 2024, 24(18): 7921-7927.
Yang Hailong, Ma Shaojie, Wang Zhuo, et al. Accelerate formation of Anammox biofilm using new conductive fillers and its nitrogen removal efficiency[J]. Science Technology and Engineering,2024,24(18):7921-7927.

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历史
  • 收稿日期:2023-08-14
  • 最后修改日期:2023-12-16
  • 录用日期:2023-12-29
  • 在线发布日期: 2024-07-05
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