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
Accelerate Formation of Anammox Biofilm Using New Conductive Fillers and Its Nitrogen Removal Efficiency
杨海龙 1马少杰 2王卓 2丁建婷 2王朝霞 2邱瑞芳 3吉莉 2谢飞2
作者信息
- 1. 山西省生态环境规划和技术研究院,太原 030000
- 2. 太原科技大学环境与资源学院,太原 030024
- 3. 山西大学环境与资源学院,太原 030006
- 折叠
摘要
厌氧氨氧化菌(anaerobic ammonia oxidizing bacteria,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.相较于传统生物填料,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(polypropylene,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 effi-ciency.The experimental results indicate that 800 ℃ is the most suitable for pyrolysis tire fillers,while having higher electrical con-ductivity 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 re-ducing 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.
关键词
厌氧氨氧化/导电填料/废弃轮胎/厌氧生物膜Key words
Anammox/conductive filler/waste tires/anaerobic biofilm引用本文复制引用
基金项目
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基金(20222047)
出版年
2024
NETL
NSTL
万方数据