Escherichia coli Regrowth in Disinfected Sewage Effluent: Effect of DOC and Nutrients on Regrowth in Laboratory Incubations and Urban Streams
Escherichia coli Regrowth in Disinfected Sewage Effluent: Effect of DOC and Nutrients on Regrowth in Laboratory Incubations and Urban Streams
复制标题
消毒污水中大肠杆菌的再生：DOC 和营养物对实验室孵化器和城市河流中再生的影响
DOI：
10.1007/s11270-012-1412-1
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Aitkenhead
中科院分区：
文献类型：
--
作者：
K. McCrary;Cara L. Harclerode Case;T. Gentry;J. Aitkenhead
本研究考察了在实验室培养的微环境中加入紫外线（UV）消毒污水和草坪草或凋落叶提取物的大肠杆菌的再生潜力。该研究的第二部分考察了营养物质在两个城市点源污水流中预测大肠杆菌的潜力。含有废水和植物提取物的培养皿孵育72小时，样品在六个时间段内取出以测量大肠杆菌。每2周采样一次，检测大肠杆菌和营养成分。在草坪草和凋落叶提取物中，在12 h和18 h内，微生物中的大肠杆菌计数超过了德克萨斯州地表水质量的二级接触休闲标准。单因素方差分析发现，植被提取物来源与浓度的交互作用比单独的植被来源或提取物浓度更重要。在点源污水排放下游取样的两条溪流中，高流量期间每年大肠杆菌变异的82%至92%和低流量期间每年大肠杆菌变异的55%至57%是由溪流水溶有机碳（DOC）和溶解有机氮（DON）、NH4-N、NO3-N或PO4-P描述的。一旦污水排放到地表水，特别是在高流量条件下，来自景观的DOC和DON以及来自污水的氮和PO4-P将为点源排放下游地表水中的大肠杆菌再生提供理想的条件。
This study examined the potential for regrowth of Escherichia coli in laboratory-incubated microcosms spiked with ultraviolet (UV)-disinfected sewage effluent and extracts derived from turfgrass or leaf litter. A second part of the study examined the potential of nutrients for predicting E. coli in two urban streams with point source effluent. Microcosms containing effluent and vegetation extracts were incubated for 72 h, samples were withdrawn over six time periods for measurement of E. coli. Streams were sampled every 2 weeks and E. coli and nutrients measured. E. coli counts in the microcosms exceeded the Texas state secondary contact recreation standard for surface water quality within 12 h for the turfgrass and within 18 h for leaf litter extracts. Univariate analysis of variance found that the interaction between vegetation extract source and concentration was more important than source of vegetation or concentration of extract alone. In the two streams sampled downstream of a point source effluent discharge, between 82 and 92 % of the variance in annual E. coli during high stream flow and between 55 and 57 % of the variance in annual E. coli during low stream flow was described by stream water-dissolved organic carbon (DOC) and dissolved organic nitrogen (DON), NH4-N, NO3-N, or PO4-P. Once effluent is discharged to surface water, particularly during high flow conditions, DOC and DON derived from the landscape and nitrogen and PO4-P derived from the effluent will provide ideal conditions for E. coli regrowth in surface waters downstream of the point source discharge.
影响因子：
12.8
作者：
Sauer, Elizabeth P.;VandeWalle, Jessica L.;McLellan, Sandra L.
通讯作者：
McLellan, Sandra L.