污泥有氧消化中的HDPE微粒的表征及其对过程的影响
R Mompó-Curell1, J L Alonso-Molina2, I Amorós-Muñoz2
1Research Institute for Industrial Radiophysical and Environmental Safety (ISIRYM), Universitat Politècnica de València, Camino de Vera S/n, 46022, Valencia, Spain.
Journal of environmental management
|July 5, 2024
概括
废水污泥中的高密度聚乙烯微塑料 (HDPE MPs) 并没有影响有氧消化器的性能. 微生物活动增加,对细菌多样性没有负面影响,尽管一些种类表现出选择性丰富.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 环境工程 环境工程
背景情况:
- 在废水中越来越多地发现微塑料 (MP).
- 废水处理过程将MP转移到污泥中.
- MPs对污泥处理,特别是有氧消化的影响需要调查.
研究的目的:
- 为了评估高密度聚乙烯 (HDPE) 微塑料对有氧消化的影响.
- 在过程中监测和描述HDPE MP.
- 评估HDPE MPs对微生物活动,多样性和污泥性能的影响.
主要方法:
- 使用了两个平行有氧消化器:AD-Control (没有MP) 和AD-HDPE (带有HDPEMP).
- 通过使用环拉作为支,HDPE MPs被引入.
- 对MP的表征涉及FTIR,拉曼光谱和光分析.
- 通过活性挥发性悬浮固体 (AVSS) 和微生物多样性 (香农指数) 监测泥性能.
主要成果:
- 7天后,AD-HDPE观察到更高的光度,与微生物活性增加 (AVSS) 相吻合.
- HDPE MP 的存在并没有影响有氧消化器的整体性能.
- HDPE MPs没有对细菌群体的微生物多样性产生负面影响 (香农指数).
结论:
- 有氧消化可以容纳高密度聚乙烯微塑料,而不会降低性能.
- HDPE MPs可以选择性地影响污泥微生物群落,特别是增加Bacteroidota属的相对丰度.
- 需要进一步研究污泥处理中微塑料的长期生态影响.
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