水源切换对水厂出水细菌群落的影响

发布时间：2018-08-27 05:43

【摘要】：针对水源切换可能造成水厂出水微生物风险的问题,以北京某水厂由本地水源切换为河北水源期间原水和出厂水为研究对象,采用焦磷酸测序技术对水中的微生物种群结构和潜在致病菌进行分析.结果显示,出厂水的细菌多样性显著低于原水,原水和出厂水中的优势菌均为变形菌门(Proteobacteria),所占比例为11.99%~95.48%,其中包括α,β和γ变形菌纲(α,β,γ-Proteobacteria),但相对丰度有较大差异.水源切换后的原水中优势菌为蓝藻门(Cyanobacteria),且该菌在切换后的出厂水中也存在.出厂水中检测到部分潜在致病菌,优势菌包括不动杆菌(Acinetobacter)和代尔夫特菌(Delftia),增加了饮用水的微生物安全风险.PCo A结果显示,水源切换前后原水中细菌群落结构变化较大,但改变水源对出厂水的微生物群落影响较小,水厂能够维持稳定的运行.
[Abstract]:In view of the problem that the water source switching may cause the risk of microorganism in the effluent of the water plant, taking the raw water and the outgoing water of a water plant in Beijing from the local water source to the Hebei water source as the research object, The microorganism population structure and potential pathogenic bacteria in water were analyzed by pyrosequencing. The results showed that the bacterial diversity of raw water was significantly lower than that of raw water. The percentage of dominant bacteria in raw water and raw water was 11.990.95. 48%, including 伪, 尾 and 纬 -Proteobacteria, but the relative abundance was different. The dominant bacteria in raw water after water source switching was cyanobacteria (Cyanobacteria), and the bacteria also existed in the raw water after switching. Some potential pathogenic bacteria were detected in the factory water. The dominant bacteria, including Acinetobacter (Acinetobacter) and Delft's (Delftia), increased the microbial safety risk of drinking water. The results showed that the community structure of bacteria in raw water changed greatly before and after the switch of water source. However, changing the source of water has little effect on the microbial community of the original water, and the water plant can maintain stable operation.
【作者单位】：北京工商大学环境科学与工程系;清华大学环境学院;北京市自来水集团;
【基金】：国家水专项(2012ZX07404002) 国家自然科学基金资助项目(51408010)
【分类号】：R123.1

【参考文献】