Micropollutant Discharge from Combined Sewer Systems Will Increase with Storm Frequency
Micropollutant Discharge from Combined Sewer Systems Will Increase with Storm Frequency
复制标题
合流下水道系统的微污染物排放量将随着暴风雨频率的增加而增加
DOI：
10.1021/acs.estlett.3c00634
复制
发表时间：
2023
影响因子：
10.9
通讯作者：
Bury N
中科院分区：
文献类型：
--
作者：
Bury N
在少雨或无雨的时候，污水处理厂(WWTP)从含有生活和工业废水的联合下水道接收干燥天气流(DWF)。在大雨期间，从不透水表面流出的多余水与DWF结合在一起，会给排水系统的容量带来压力。为防止污水外溢，较大型的污水处理厂设有雨水溢流池，以储存多余的水，待雨势停止后，再重新进入污水处理厂。在极端降雨事件中，水箱可能不能起到足够的缓冲作用，自来水公司被允许将未经处理的污水直接排放到接收水的水体中，以防止污水系统中的污染水积累，这一策略在全球范围内都可以看到。全球风暴事件的频率、强度和持续时间正在增加，随着城市地区不透水表面面积的增加，排水系统将进一步被淹没。在英国，水务公司有法定责任报告风暴期间未经处理的废水排放小时数。由河流信托基金(https://theriverstrust.)整理的数据事件持续时间监测(EDM)网络的数据显示，2022年，包括伦敦在内的泰晤士河地区有74,693小时未经处理的废水排入泰晤士河及其支流，全国范围内的排放小时数超过2.4小时。令人担忧的是，也有越来越多的证据表明，未经处理的污水排放发生在少雨或无雨的时候。1关于河流和浴场排泄物、肠道细菌水平和污水真菌数量增加的报告，以及营养输入增加导致富营养化和低氧事件增加导致鱼类和水生大型无脊椎动物死亡的报道，提高了公众的认识。然而，废水是其他化学物质的混合物，被称为微污染物，如药品、个人护理产品、洗涤剂和清洁产品，最近对淡水的一项全球分析发现，药物无处不在。2污水处理厂降低污水中微污染物浓度的能力取决于基础设施(如二级或三级废水处理工艺)和化学物质的降解倾向。3但从逻辑上讲，如果废水没有进入污水处理厂，例如在暴雨溢流期间，则不会
During times of little or no rain, wastewater treatment plants (WWTP) receive dry weather flow (DWF) from combined sewers containing domestic and industrial wastewater. During severe rain events, the excess water flowing off impervious surfaces combined with the DWF puts a strain on the capacity of the sewer system. To prevent sewage overflows, larger WWTP are fitted with storm overflow tanks to store excess water which then re-enters the WWTP on cessation of the rain. In extreme rain events, the tanks may not be a sufficient buffer, and the water utility companies are permitted to discharge this combined sewer overflow as untreated water directly into the receiving water body to prevent the buildup of contaminated water in the sewer system, a strategy seen throughout the globe.The global frequency, intensity, and duration of storm events is increasing, and along with the increase in impervious surfaces areas in urban areas, drainage systems will be further inundated. In the United Kingdom, the water utility companies have a statutory obligation to report the number of hours of untreated wastewater discharge during storms. The data collated by the Rivers Trust (https://theriverstrust. org/sewage-map) from the Event Duration Monitoring (EDM) network shows that in 2022 in the Thames region, that includes London, 74,693 h of untreated wastewater was discharged in the River Thames and its tributaries, and nationally the number of hours exceeds 2.4 M. Worryingly, there is also mounting evidence of raw sewage discharge occurring at times of little or no rain. 1 The reports of increases in fecal matter, enteric bacteria levels, and proliferation of sewage fungus in rivers and bathing areas, as well as the increase in nutrient input causing eutrophication and increased hypoxia events resulting in fish and aquatic macroinvertebrate kills, have raised awareness among the public. Wastewater is, however, a cocktail of other chemicals, referred to as micropollutants such as pharmaceuticals, personal care products, detergents, and cleaning products, and a recent global analysis of freshwater found pharmaceuticals are ubiquitous. 2 The ability of a WWTP to reduce micropollutant concentrations in effluent depends on the infrastructure (eg, secondary or tertiary wastewater treatment processes) and propensity of the chemical to degrade. 3 But logically, if wastewater does not enter the WWTP, eg, during storm overflow, then no
DOI：
10.1016/j.scitotenv.2018.12.108
发表时间：
2019-03
期刊：
The Science of the total environment
影响因子：
--
作者：
Kelly Munro;C. Martins;M. Loewenthal;S. Comber;D. Cowan;Luisa Pereira;L. Barron
通讯作者：
Kelly Munro;C. Martins;M. Loewenthal;S. Comber;D. Cowan;Luisa Pereira;L. Barron
较新的药物是否更难以在废水处理中去除？
影响因子：
6
作者：
J. Straub;Julien Le Roux;Damien Tedoldi
通讯作者：
Damien Tedoldi