污水侵入饮用水的破坏性影响:微生物的继承和在分子层面的有机转化
Mengqing Fan1, Anran Ren1, Mingchen Yao1
1Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Sanitary Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, the Netherlands.
Water research
|August 29, 2024
概括
污水入饮用水会立即增加生物质和细菌物种. 随着时间的推移,它改变了水的微生物学,将控制权从有机物转移到细菌,突出了长期的风险.
科学领域:
- 环境微生物学环境微生物学
- 水质科学 水质科学
- 公共卫生 公共卫生
背景情况:
- 饮用水系统面临着因基础设施老化和水资源短缺而增加的污水侵入风险.
- 虽然已知健康风险,但污水对饮用水微生物学和溶解有机物 (DOM) 的影响尚不清楚.
研究的目的:
- 调查低水平污水侵入 (1%) 对自来水微生物学和DOM组成的直接和长期影响.
- 为了确定污水侵入后细菌和DOM共变的控制因子的转变.
主要方法:
- 在受控条件下模拟污水侵入自来水.
- 分析总可培养数 (TCC),安普利康序列变异 (ASV),溶解有机碳 (DOC) 和DOM分子公式.
- 对细菌和DOM组合共变的统计分析.
主要成果:
- 1%的污水直接入侵导致生物质增加了8倍,细菌物种增加了48.9%,DOC和独特的DOM配方显著增加.
- 随着时间的推移,细菌生长率增加了5倍,特定的细菌种群被促进,并出现了998种新的DOM配方.
- 协差分析显示,从DOM依赖转向影响微生物和DOM组成的细菌控制的过程.
结论:
- 污水入严重扰乱饮用水微生物学和DOM,超过直接污染的长期影响.
- 转向细菌治理的转变凸显了水系统在入侵后的动态的根本变化.
- 调查结果强调,需要解决污水入饮用水分配系统的长期微生物影响.
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