PD/A颗粒性污泥对氧基环素应激的反应和自我调节
Lifeng Hu1, Naif Abdullah Al-Dhabi2, Zixuan Zhu1
1National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
The Science of the total environment
|June 1, 2024
概括
氧基环素 (OTC) 抑制了部分脱/亚纳摩克斯 (PD/A) 系统,减少了的去除. PD/A污泥通过EPS显示自我保护,但高OTC水平会导致细胞溶解和功能细菌减少,影响废水处理效率.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
- 环境化学环境化学
背景情况:
- 新兴的污染物,如氧化四环素 (OTC),对市政废水处理厂构成挑战.
- 部分脱/亚纳摩克斯 (PD/A) 工艺对于去除至关重要,但易受污染物的影响.
- 了解OTC对PD/A系统的影响对于其有效应用至关重要.
研究的目的:
- 为了研究PD/A颗粒系统在氧基环素 (OTC) 应力下的运行特性.
- 阐明PD/A污泥暴露于OTC时的自我调节机制.
- 为管理废水处理中的抗生素干扰提供指导.
主要方法:
- 暴露PD/A颗粒污泥在不同度的OTC (短期和长期).
- 监测去除效率和功能性细菌活动.
- 对细胞外聚合物质 (EPS) 含量和微生物群落结构 (关键属的相对丰度) 的分析.
主要成果:
- 在100 mg/L以下的OTC度引起短期抑制;在150-300 mg/L抑制PD和Anammox活性.
- 长期暴露 (20-30 mg/L OTC) 显著减少了去除,并抑制了PD的NO3 - - N转化为NO2 - - N (73.77%至50.17%).
- 阿纳莫克斯活性急剧下降,EPS含量最初增加 (自我保护),但由于细胞溶解而在高OTC下降;像Candidatus_Brocadia和Thaure这样的关键细菌的数量减少.
结论:
- OTC显著损害了PD/A系统的性能,影响了脱和Anammox过程.
- PD/A污泥表现出涉及EPS的自我保护机制,但由于高OTC度导致细胞溶解,可以克服这一问题.
- 关键微生物群体的丰度减少是性能恶化的首要原因,突显了需要制定策略来减轻废水处理中的抗生素影响.
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