多次温度变化对潮流构造湿地中去除和微生物群落结构的影响
Xueyuan Bai1, Jianwei Li2, Haibo Jiang2
1College of Engineering, Jilin Normal University, Siping, 136000, China; State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China.
Environmental research
|December 14, 2024
概括
温度显著影响潮流构建湿地 (TFCWs) 的去除. 较高的温度 (23°C) 会促进的转化,而较低的温度 (8°C) 会降低效率并改变微生物群落结构.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 水处理工程水处理工程
背景情况:
- 潮流构造湿地 (TFCWs) 由于动态的水位波动增强微生物活动,因此有效地去除.
- 温度对TFCW中转化和微生物社区动态的影响还不清楚.
研究的目的:
- 研究不同温度对TFCW中转化速率和微生物群落结构的影响.
- 为了确定TFCW中去除效率的最佳温度范围.
主要方法:
- 在140天内进行了受控实验,将TFCW暴露在四种不同的温度条件 (23°C,16°C,12°C和8°C) 中.
- 测量了去除的效率,包括氨 (NH4+-N) 和总 (TN) 的转化率.
- 使用分子技术分析了微生物社区结构和多样性,并计算了香农多样性指数.
主要成果:
- 去除效率在23°C时最高,NH4+-N和TN的转化率分别为9.28 ± 0.06 g/m3/day和8.35 ± 0.08 g/m3/day.
- 在8°C时,去除效率下降,NH4+-N和TN的转化率为7.38 ± 0.05 g/m3/day和6.78 ± 0.05 g/m3/day.
- 微生物多样性 (香农指数) 在23°C (5.12 ± 0.21) 较高,而在8°C (4.52 ± 0.40) 较高.
- 较低的温度 (12°C和8°C) 促进了微生物的积极相互作用,并促进了像Firmicutes,Proteobacteria和Thaumarchaeota这样的种群的弹性.
- 溶解的氧气水平影响了细菌和考古社区的组成.
结论:
- 温度在调节TFCWs的生态功能和去除效率方面发挥着关键作用.
- 废水处理系统的设计和管理必须考虑温度变化以获得最佳性能.
- 微生物群落的结构和相互作用受到温度的显著改变,影响了整体的去除过程.
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