在生物电化学系统中,在长时间的负电极电位下,增强了通过anammox介导的去除
Hans Priks1, Ivar Zekker2, Antonio Ivan Manuell Nava3
1Institute of Technology, University of Tartu, 1 Nooruse St., 50411, Tartu, Estonia.
Environmental science and pollution research international
|October 31, 2024
概括
生物电化学无氧氨氧化 (anammox) 系统增强了废水中的去除. 应用的潜力显著提高了去除率和效率,显示了废水处理应用的前景.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 电化学 电化学 电化学
背景情况:
- 生物电化学系统利用微生物细胞外电子转移 (EET) 来处理废水.
- 亚纳莫克斯细菌具有c型细胞染色体,可促进ETE,对去除至关重要.
- 亚纳莫克索索姆含有富含铁的颗粒和独特的膜结构,可能增强ETE.
研究的目的:
- 为了研究电刺激的anammox除细胞 (EANR) 中的除效率.
- 评估应用电位 (-300 mV, -500 mV, -700 mV与Ag/AgCl) 对anammox工艺的影响.
- 为了分析微生物社区的变化,以应对应用的潜力.
主要方法:
- 在开放电路 (控制) 和各种应用电位下运行EANR电池.
- 对特定去除率 (SNRR) 的比较分析.
- 使用16S rRNA基因测序进行微生物社区分析.
- 监测氨,亚酸盐和总去除效率.
主要成果:
- 与Ag/AgCl相比,在-700mV的峰值性能显示,与对照组 (8.3g N/m2 /day) 相比,SNRR (11.2g N/m2 /day) 高出140%.
- 在微生物群体中应用潜在的富含未分类的"Candidatus Brocadia".
- 在24小时周期内,EANR实现了91%的氨和53%的化物去除,在150小时内达到100%的总去除.
结论:
- 电刺激显著提高了基于anammox的去除效率和速度.
- EANR系统有效地处理富含的废水,例如来自生物气处理的废水.
- 该技术显示出在废水处理的综合生物电化学系统中实地应用的潜力.
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