揭示溶解有机物变异与微生物共生网络在石灰处理的景观污泥中的相互作用
Zexu Chen1, Yu Zhang1, Boyuan Yang1
1School of Environmental Studies, China University of Geosciences, Wuhan, 430074, Hubei, China.
Environmental research
|October 23, 2024
概括
污泥造景的最佳石灰剂量为0.4g/g-TS,增强稳定性和植物健康. 这种剂量促进了性物质的形成和有益的微生物转移,以有效地管理废物活性污泥 (WAS).
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 土壤科学 土壤科学
背景情况:
- 石灰预处理对于污泥的卫生和稳定至关重要.
- 在景观设计过程中,最佳的石灰剂量平衡了污泥稳定性 (>0.2 g/g-TS) 与植物/土壤健康 (<0.8 g/g-TS).
- 有限的研究存在于石灰剂量效应,结合污泥稳定和植物生长促进.
研究的目的:
- 在污泥景观化过程中调查微生物动力学和溶解有机物 (DOM) 转化.
- 确定不同剂量的石灰 (0-0.8 g/g-TS) 对污泥稳定和DOM的影响.
- 确定最佳的石灰剂量,以实现高效的污泥造景.
主要方法:
- 在90天内进行了5个石灰剂量梯度 (0,0.2,0.4,0.6,0.8克石灰/g-TS) 的泥造景实验.
- 微生物群落转移和溶解有机物 (DOM) 转变的分析.
- 反应组学和并发网络分析,以了解微生物介导的DOM变化.
主要成果:
- 0.4 g/g-TS的石灰剂量被确定为废物活性污泥 (WAS) 稳定性的下限.
- 这种最佳剂量最大限度地提高了性物质的形成,并最大限度地降低了植物毒性.
- 观察到增强的蛋白质降解,脱碳化诱导的化,以及微生物属的转变 (例如,到Firmicutes).
结论:
- 0.4 g/g-TS是污泥造景,平衡稳定和生态效益的最佳石灰剂量.
- 微生物群落,特别是Firmicutes,Proteobacteria和Bacteroidetes,驱动DOM转换.
- 这项研究为有效的污泥管理提供了对微生物介导的DOM转换的关键见解.
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