在饮用水分配系统中,物质驱动的微生物学影响的腐蚀机制在饮用水分配系统中
Tanghao Liu1, Jianing Xiu1, Xuejing Huang1
1State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
Water research
|October 10, 2025
概括
管道材料对饮用水系统中的微生物影响腐蚀 (MIC) 产生重大影响. 无线管道呈现出更高的腐蚀和细菌生长,而有线管道则促进了不同的微生物群落,从而使新的风险评估策略成为可能.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 微生物影响腐蚀 (MIC) 加快饮用水配送系统 (DWDS) 的退化,并影响水质.
- 我们对管道材料和层如何影响生物膜形成并驱动MIC的理解有限.
- 调查这些相互作用对于维护基础设施完整性和水安全至关重要.
研究的目的:
- 为了研究管道材料,防护,生物膜和MIC在现场老化的DWDS管道之间的相互作用.
- 描述特定材料的微生物群落及其在腐蚀过程中的作用.
- 为腐蚀风险评估建立一个非侵入性监测策略.
主要方法:
- 使用形态特征,微生物社区概况和生物化学分析分析了21个现场老化的管道 (铁,铁,钢铁).
- 量化生物膜密度和确定的微生物种群,包括氧化铁和减少硫酸盐的细菌.
- 评估了与硫酸盐转化相关的功能基因和与铁溶解相关的微生物活性.
主要成果:
- 与水泥线管道相比,无线钢管的腐蚀和生物薄膜密度明显高 (13.5倍).
- 确定了特定于材料的微生物群落:Sideroxydans和Desulfovibrio在未线管道中,Shewanella和Streptococcus在线管道中.
- 富含硫酸盐的环境促进了钢管中的硫酸盐降解细菌 (SRB),而Streptococcus的乳酸生产推动了管中的铁溶解.
结论:
- 管道材料和层类型决定了不同的MIC机制和微生物协会.
- 确定了关键的微生物参与者 (例如,Desulfovibrio,Sideroxydans,Streptococcus) 和功能基因 (cysI/cysJ) 驱动腐蚀.
- 开发了一种非侵入性监测策略,将废水生物标志物与管道壁生物膜动态联系起来,以评估腐蚀风险.
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