暴露于安培的化污泥的生理适应和种群动态
Sergio Pavel Esquivel-Mackenzie1, Omar Oltehua-Lopez1, Flor de María Cuervo-López1
1Department of Biotechnology-CBS, Metropolitan Autonomous University Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, 09310, Mexico City, Mexico.
概括
废水处理污泥适应了常见的抗生素安培西林 (AMP),显示初始酸盐积累,但最终恢复稳定化. 污泥也消耗了抗生素,表明了微生物的抵抗力.
科学领域:
- 环境微生物学环境微生物学
- 污水处理 污水处理 污水处理
- 抗生素耐药性 抗生素耐药性
背景情况:
- 废水中的抗生素可以破坏微生物群落和处理过程.
- 化,一个关键的废水处理过程,对抗生素抑制很敏感.
研究的目的:
- 为了研究安培 (AMP) 对序列批量反应堆 (SBR) 中的化污泥的影响.
- 评估暴露于AMP的污泥的适应,动力学和种群动态.
主要方法:
- 一个连续批量反应堆 (SBR) 经过控制的安培 (AMP) 度 (14.4 mg/L) 运行.
- 在30个周期中监测了氨的消耗,酸盐的积累和酸盐的产生.
- 分析了细菌种群动态,以评估适应性和确定关键品种.
主要成果:
- 西林 (AMP) 最初抑制了67%的亚酸盐氧化,但没有影响氨的消耗.
- 污泥表现出生理适应,恢复了酸盐氧化活性,并实现了高酸盐产量 (0.87 ± 0.10).
- 从第一个周期中完全删除了安皮西林,并且像Nitrosomonas,Nitrosospira和Nitrospira这样的主导属适应了,增加了Nitrospira的丰富性.
结论:
- 化污泥可以适应安培 (AMP) 暴露,保持重要的处理功能.
- 特定的细菌种群,包括Nitrospira,在酸盐氧化的恢复中发挥着至关重要的作用.
- 异质型细菌如Burkholderia,Pseudomonas和Thauera可能参与安培的降解.
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