抗生素在城市固体废物分解过程中抑制甲基生成
Renjie Ni1, Shuijing Wang1, Xiaoxing Lin1
1School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China; Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China.
The Science of the total environment
|September 27, 2023
概括
城市固体废物 (MSW) 填埋场中的抗生素抑制了关键的甲生产微生物,减少了整体甲生成. 虽然整体分解阶段保持完整,但特定的微生物群落受到影响,影响生物降解物质降解和甲生产.
科学领域:
- 环境微生物学 环境微生物学
- 废物管理 废物管理
- 生物地质化学生物地质化学
背景情况:
- 城市固体废物 (MSW) 垃圾填埋场是已知的抗生素来源,但它们对废物分解和甲基生成的影响尚未完全理解.
- 抗生素可以通过各种途径进入环境,可能会影响参与有机物降解的微生物群落.
研究的目的:
- 研究常见抗生素的环境相关度 (ERC) 对MSW分解和甲基生成的影响.
- 分析细菌和古生物群落的变化以及在抗生素暴露下mcrA基因的丰富性.
主要方法:
- 在ERC (200μg/kg) 中,在生物反应器中与八种抗生素 (四环素,硫胺胺,宏类) 进行了MSW分解研究.
- 液的物理化学参数 (pH,COD,BOD) 被监测,以确定分解阶段 (有氧,无氧酸,甲).
- 使用16S rRNA基因测序来评估细菌和古生物学成分,并通过qPCR量化mcrA基因丰度.
主要成果:
- 抗生素显著改变了细菌和古生物社区结构,减少了mcrA基因的丰富性,并抑制了甲基生成.
- 抑制了特定的微生物群体,包括纤维素降解细菌 (Firmicutes) 和水解细菌 (Proteobacteria),从而减少了生物降解物质的降解.
- 尽管存在微生物抑制,但在经过处理和未经处理的生物反应器中,MSW的整体分解过程及其不同的阶段都被成功确立.
结论:
- 环境相关的抗生素度可以通过改变微生物群落的组成和功能来抑制MSW垃圾填埋场中的甲基生成.
- 这些发现为甲管理策略和废物分解中抗生素对环境的影响提供了关键的见解.
- 虽然整体分解途径没有被破坏,但甲生产的效率受到抗生素污染的显著影响.
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