Impact of an intense combined sewer overflow event on the microbiological water quality of the Seine River
Impact of an intense combined sewer overflow event on the microbiological water quality of the Seine River
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DOI：
10.1016/j.watres.2010.09.024
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发表时间：
2011-01-01
期刊：
影响因子：
12.8
通讯作者：
Servais, Pierre
中科院分区：
文献类型：
--
作者：
Passerat, Julien;Ouattara, Nouho Koffi;Servais, Pierre
为了更好地了解短期和中期的影响，合并污水溢流（CSO）的微生物质量的接收河流，我们研究了CSO排放的组成和监测在几个小时内的粪便指示细菌（FIB）的浓度变化在受影响的河流水体。2008年夏季，由于一年中最强的降雨，Clichy排水口（法国巴黎聚集区）发生了CSO。在6小时内，578，705立方米的污水和124吨悬浮物（SM）被排放到塞纳河中。CSO含有1.5 × 10（6）E。大肠埃希菌和肠球菌的检出率分别为4.0 × 105/100 mL和77%;大肠杆菌附着在SM上。结果表明，地表径流对CSO的贡献率为89%，而下水道沉积物的再悬浮对SM的贡献率约为75%，对E的贡献率约为10-70%。大肠杆菌和40-80%的肠球菌。在CSO排水口的下游，塞纳河受影响水体中的FIB浓度（2.9 x 10（6）E。大肠杆菌和7.6 × 10（4）肠球菌每100毫升）超过了两个数量级的通常干燥天气的浓度。在运输13-14 h后，这些浓度下降了66%。大肠埃希菌和肠球菌的阳性率为79%。这种下降很好地解释了我们的估计稀释，衰减造成的死亡率或可培养性和沉降的附着部分FIB的损失。(C)2010爱思唯尔有限公司版权所有。
For a better understanding of the short and mid-term impacts of a combined sewer overflow (CSO) on the microbiological quality of the receiving river, we studied the composition of a CSO discharge and monitored during several hours the changes in the concentration of fecal indicator bacteria (FIB) in the impacted river water mass. The CSO occurred at the Clichy outfall (Paris agglomeration, France) in summer 2008 as a result of the most intense rainfall of the year. In 6h, 578, 705 m(3) of sewage and 124 t of suspended matter (SM) were discharged into the Seine River. The CSO contained 1.5 x 10(6) E. coli and 4.0 x 10(5) intestinal enterococci per 100 mL on average, and 77% of the E. coli were attached to SM. It was estimated that 89% of the CSO discharge was contributed by surface water runoff, and that resuspension of sewer sediment contributed to similar to 75% of the SM, 10-70% of the E. coli and 40-80% of the intestinal enterococci. Directly downstream from the CSO outfall, FIB concentrations in the impacted water mass of the Seine River (2.9 x 10(6) E. coli and 7.6 x 10(4) intestinal enterococci per 100 mL) exceeded by two orders of magnitude the usual dry weather concentrations. After 13-14 h of transit, these concentrations had decreased by 66% for E. coli and 79% for intestinal enterococci. This decline was well accounted for by our estimations of dilution, decay resulting from mortality or loss of culturability and sedimentation of the attached fraction of FIB. (C) 2010 Elsevier Ltd. All rights reserved.