School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
School of Environmental Science and Engineering, Shandong University, Jinan 250100, China; Provincial Engineering Center on Environmental Science and Technology, Jinan 250061, China.
Sci Total Environ. 2018 Sep 1;634:769-779. doi: 10.1016/j.scitotenv.2018.04.008. Epub 2018 Apr 10.
The microbial community structures of drinking water treatment sludge (DWTS) generated for raw water (RW) from different locations and with different source types - including river water, lake water and reservoir water -were investigated using high-throughput sequencing. Because the unit operations in the six DWTPs were similar, community composition in fresh sludge may be determined by microbial community in the corresponding RW. Although Proteobacteria, Cyanobacteria, Bacteroidetes, Firmicutes, Verrucomicrobia, and Planctomycetes were the dominant phyla among the six DWTS samples, no single phylum exhibited similar abundance across all the samples, owing to differences in total phosphorus, chemical oxygen demand, Al, Fe, and chloride in RW. Three genera of potentially toxic cyanobacteria (Planktothrix, Microcystis and Cylindrospermopsis), and four potential pathogens (Escherichia coli, Bacteroides ovatus, Prevotella copri and Rickettsia) were found in sludge samples. Because proliferation of potentially toxic cyanobacteria and Rickettsia in RW was mainly affected by nutrients, while growth of Escherichia coli, Bacteroides ovatus and Prevotella copri in RW may be influenced by Fe, control of nutrients and Fe in RW is essential to decrease toxic cyanobacteria and pathogens in DWTS.
采用高通量测序技术研究了不同水源（包括河水、湖水和水库水）和不同水源类型的饮用水处理污泥（DWTS）的微生物群落结构。由于六个 DWTP 中的单元操作相似，新鲜污泥中的群落组成可能取决于相应 RW 中的微生物群落。尽管六个 DWTS 样品中的优势菌群主要为变形菌门、蓝藻门、拟杆菌门、厚壁菌门、疣微菌门和浮霉菌门，但由于 RW 中的总磷、化学需氧量、Al、Fe 和氯化物的差异，没有一个门在所有样品中表现出相似的丰度。在污泥样品中发现了三种潜在有毒蓝藻（束丝藻属、微囊藻属和柱孢藻属）和四种潜在病原体（大肠杆菌、卵形拟杆菌、普雷沃氏菌和立克次氏体）。由于 RW 中潜在有毒蓝藻和立克次氏体的增殖主要受营养物质的影响，而大肠杆菌、卵形拟杆菌和普雷沃氏菌在 RW 中的生长可能受 Fe 的影响，因此控制 RW 中的营养物质和 Fe 对于减少 DWTS 中的有毒蓝藻和病原体至关重要。
