在膜气化生物膜反应器中通过添加xylamine来实现部分化-anammox
Ning Mei1, Fangxu Jia2, Ying Liu2
1Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing, 100044, China; Beijing ENFI Environmental Protection Co., Ltd., Beijing, 100038, China.
Journal of environmental management
|October 2, 2025
概括
氧胺 (NH2OH) 能够有效地抑制膜气化生物膜反应器 (MABR) 中的化氧化细菌 (NOB),用于部分化-氧化 (PN/A) 过程. 这一策略提高了去除效率,并促进了关键细菌,为废水处理提供了稳定的解决方案.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 废水处理工程 废水处理工程
背景情况:
- 膜气化生物膜反应器 (MABR) 适合部分化-亚纳摩克斯 (PN/A) 由于不同的微生物区.
- 在富含氧的MABR生物膜中抑制酸盐氧化细菌 (NOB) 具有挑战性,而亚纳摩克斯细菌 (AnAOB) 对苛刻的治疗很敏感.
研究的目的:
- 为了证明氧胺 (NH2OH) 在MABR中实现稳定的PN/A的有效性.
- 研究NH2OH对NOB抑制和促进氨氧化细菌 (AOB) 和AnAOB的影响.
主要方法:
- 长期MABR实验 (250天) 使用受控的低溶氧水平.
- 连续和间歇的10毫克L-1NH2OH添加的应用.
- 功能性基因转录水平 (nxrB,amoA,hzsB) 和微生物社区结构的分析.
主要成果:
- 仅仅是低溶解氧气无法抑制NOB.
- 添加NH2OH有效地抑制了NOB (Nitrospira, "Ca. 尼托托加",Nitrolancea) 并推广了AOB和AnAOB.
- 去除效率从74.0 ± 1.1%增加到91.7 ± 1.6%.
- NH2OH改变了基因转录,减少了nxrB,增加了amoA和hzsB.
- 暂时积聚的氨酸和氧化有助于NOB抑制.
结论:
- 氧胺 (NH2OH) 是MABR中NOB抑制的一个可行的策略,可实现稳定的PN/A.
- NH2OH促进有益的细菌 (AOB,AnAOB) 并提高整体去除效率.
- 该机制涉及改变微生物基因表达和临时积聚中间体,降低NOB适应风险.
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