不同颗粒大小的聚乙烯四甲微塑料对污泥无氧消化过程的影响和机制
Qing Yang1, Jiaxin Li1, Linlin Ma1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China.
Environmental pollution (Barking, Essex : 1987)
|December 9, 2024
概括
废水污泥中的微塑料会根据大小和老化不同影响无氧消化. 较小或较大的老化微塑料显著改变了甲生产和微生物通路.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 微生物学 微生物学
背景情况:
- 城市污水处理厂 (WWTP) 在污水污泥中积累了微塑料.
- 微塑料对污泥无氧消化 (AD) 的影响尚未完全理解.
研究的目的:
- 为了研究聚乙烯二甲 (PET) 微塑料对污泥无氧消化的影响.
- 为了比较不同微塑料颗粒大小和物理衰老对甲生产的影响.
主要方法:
- 使用各种尺寸 (100,300,500,800微米) 的原始和老化PET微塑料进行比较研究.
- 分析甲生产,模型配套,舞台讨论和微生物社区结构.
- 调查限制速度的步骤和甲原路径的转移.
主要成果:
- 中型 (300,500微米) PET微塑料抑制了甲的产生 (11.3-24.9%).
- 小 (100微米) 和大 (800微米) 微塑料的效果各不相同;老化小PET的控制产量相似,而老化大PET则促进了生产.
- 微塑料的添加改变了微生物群落,将甲基生物从乙烯基向水的途径转移.
结论:
- 微塑料的大小和老化显著影响污泥无氧消化性能和甲产量.
- 限制速率的步骤因微塑料的大小而异,影响溶解,水解和甲基生成.
- 聚乙烯微塑料改变了微生物群落结构,影响了WWTP中的无氧消化效率.
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