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在有氧污泥处理中的微塑料和粘土颗粒上殖民的不同微生物组合

Zixuan Zhang¹, Haiyu Zhang¹, Hong Qiang²

¹College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China.

The Science of the total environment

|September 2, 2023

概括

有氧污泥中的微塑料会改变微生物群落,增加病原体并抑制有机物分解. 清除MP对于有效的污泥处理和降低疾病风险至关重要.

科学领域:

环境微生物学环境微生物学
材料科学是一种材料科学.
污泥处理污泥处理

背景情况:

微塑料 (MP) 在水生环境和污泥中越来越普遍.
了解MP的微生物殖民对于评估其对环境的影响至关重要.
有氧污泥处理过程对于废水管理至关重要.

研究的目的:

对聚烯微塑料 (PPMP),聚烯微塑料 (PSMP) 和蒙莫里隆石 (MMT) 的微生物殖民,社区结构和功能进行调查.
为了比较微生物与有氧污泥中的人工 (MPs) 与天然 (MMT) 基质的相互作用.
评估MPs对污泥特性,微生物生态和有机物分解的影响.

主要方法:

在化后对基板 (PPMP,PSMP,MMT) 的性能分析.
高通量测序用于微生物社区结构和功能分析.
在有氧污泥中化基板45天.

主要成果:

MPs和MMT的表面特性发生了变化,表明微生物沉积.
与MMT相比,微塑料基板表现出不同的微生物结构.
聚乙烯微塑料 (PSMP) 显示出比聚烯微塑料 (PPMP) 和MMT更高的微生物多样性和丰富性.
病原体的丰富性 (例如,伪omonas,Klebsiella) 在MPs上增加.
与基因和基因组代谢途径的京都百科全书相关的疾病风险在国会议员上升.
与MMT相比,MPs抑制了有机物 (可溶化学氧需求,蛋白质) 的分解.

结论:

微塑料作为微生物殖民和运输的关键载体.
在有氧污泥中,MPs显著改变了微生物社区结构和功能.
存在MPs会对污泥处理效率产生负面影响,并增加潜在的疾病风险.
从污泥中去除微塑料是必要的,以减轻对处理过程和环境健康的不利影响.

关键词:

微生物社区的微生物社区.微塑料是一种微塑料.这是一种蒙莫里隆石 (Montmorillonite).病原体是一种病原体.污泥处理污泥处理

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