基因组解析的元转录组学揭示了在有氧颗粒性污泥中跨集体大小的独特微生物功能
A Y A Mohamed1, Laurence Gill1, Alejandro Monleon1
1Department of Civil, Structural & Environmental Engineering, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland.
Environmental science and ecotechnology
|April 16, 2025
概括
在有氧颗粒污泥 (AGS) 中的微生物活动因聚合物大小而异. 像Accumulibacter这样的聚酸盐积聚生物 (PAO) 主导较大的颗粒,而Phosphoribacter则在较小的中活跃,影响废水处理.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 大基因组学和大转录组学.
背景情况:
- 有氧颗粒污泥 (AGS) 系统利用微生物聚合物进行高效的废水处理.
- 在AGS中,在不同的聚合物大小中存在不同的微生物社区组成.
- 有限的研究已经比较了AGS中不同聚合物大小的特定微生物活动.
研究的目的:
- 在一个全尺寸的AGS工厂中,研究不同尺寸的聚合物中的微生物活动模式.
- 了解AGS中微生物丰富度和代谢活动之间的关系.
- 为了确定微生物群落与总体大小相关的功能角色.
主要方法:
- 用基因组解析的转录基因组学来分析微生物活动.
- 在花泥 (<0.2毫米),小颗粒 (0.2-1.0毫米) 和大颗粒 (>1.0毫米) 中分析微生物活动模式.
- 差异基因表达分析,以在总体大小中比较关键代谢途径.
主要成果:
- 微生物的丰富性与转录基因活动的相关性很弱.
- 泥 (FL) 含有来自*Candidatus* Phosphoribacter的活性化剂和发酵性多酸盐积聚生物 (PAO).
- 小颗粒和大颗粒 (SG和LG) 显示与*Ca.相关的PAO更活跃. * Accumulibacter,具有更高的吸收基因表达.
结论:
- 聚合物大小显著影响了AGS中的微生物群落的代谢活动和功能作用.
- 不同的微生物种群,特别是PAO,表现出大小依赖的活性模式.
- 结果为优化废水处理中的AGS性能提供了洞察力.
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