突发的硫甲佐醇冲击导致微藻-化细菌联盟中的酸盐积累:生理反应和光调节策略
Yuqing Zhang1, Junrong Li1, Lili Si2
1Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
Journal of environmental management
|July 20, 2024
概括
硫甲醇 (SMX) 的抗生素冲击通过抑制光合作用,导致微藻-化细菌联盟 (MNBC) 中的亚酸盐积累. 增加光强度提高了性能,为稳定的MNBC过程提供了一种策略.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物技术是生物技术.
背景情况:
- 微藻化细菌联盟 (MNBC) 对废水处理具有前景.
- 抗生素污染,如硫甲醇 (SMX),对生物处理过程的稳定性和性能构成威胁.
- 了解抗生素冲击对MNBC的生理影响对于优化废水处理至关重要.
研究的目的:
- 为了研究MNBC对硫甲醇 (SMX) 冲击的生理反应.
- 评估光调节策略在减轻SMX冲击和高度的负面影响方面的有效性.
- 为在抗生素压力下MNBC过程的稳定运行提供理论基础.
主要方法:
- 在mg/L水平下,MNBC暴露于SMX冲击.
- 测量氨去除,酸盐积累和溶解氧 (DO) 的测量.
- 对活性氧化物种 (ROS) 生产,微藻类光合作用活性和基因表达 (amoA,hao,nxrA) 的分析.
- 应用中央复合材料设计与响应表面方法 (CCD-RSM) 结合,以优化工艺.
主要成果:
- SMX冲击导致酸盐的积累,主要是由于ROS的增加,光合作用的抑制和化基因表达的改变 (上调的amoA和hao,下调的nxrA).
- 高的度加剧了酸盐的积累,并通过降低DO减少了的去除.
- 增加的光强度增强了微藻的光氧化,促进了化基因表达,并改善了的去除,同时减少了酸盐的积累.
结论:
- 短期的SMX冲击可以通过损害化和光合作用来破坏MNBC性能.
- 光调节是一种有效的策略,可以增强微藻的光氧化和促进化,从而在抗生素压力和高负载下稳定MNBC过程.
- 这项研究提供了关于MNBC在被抗生素污染的环境中的弹性和管理的关键见解.
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