• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >Evaluating the Effectiveness of Electrocoagulation (EC) Process in Reducing the COD of Simulated urban Runoffs
【24h】

Evaluating the Effectiveness of Electrocoagulation (EC) Process in Reducing the COD of Simulated urban Runoffs

机译：评估电凝（EC）工艺减少模拟城市径流COD的有效性

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A large scale of precipitation amounts in urban areas becomes runoff because of increasing proportionof impermeable surfaces relative to natural permeable surfaces. The runoff leads to numerous concernsin urban areas by carrying pollutants from urban surfaces, creating a major source of contaminants.Further concerns were raised on the quality of runoffs by observing their negative impacts on the riverand lakes in the downstream and surrounding areas of the city, especially in the early rainfalls thatoccur after a period of no rainfall. The increased runoff contamination can cause organic shock inconventional wastewater treatment systems, such as activated sludge.The electrocoagulation (anelectrochemical process) is an effective and rapid method for treating water-soluble salts. The presentstudy was conducted to investigate the effects of reaction time, voltage and pH on reducing the CODlevels of runoff collected from surfaces of highly trafficked urban streets in Torbat-e Heydarieh, Iran.The results of this study showed that this process was able to remove the COD, BOD and turbiditywith maximum efficiency of 80, 82 and 92% in optimal conditions (reaction time of 60 min, pH of10.4, voltage of 30 volts). However, this maximum removal was different for varied samples collectedbefore humps, areas near to squares and the border of main streets. Investigating the reaction timevariable determined that a large part of COD was removed in the first 15 minutes at 10 volts. Inaddition, the highest level of metal consumption was reported to be 0.9 g/cm at 20 volts. This studyshowed that the electrocoagulation can be used as a pre-treatment method for urban runoffs beforedelivery to conventional wastewater treatment processes or receiving waters.
机译：由于不透水表面相对于自然可透水表面的比例增加，城市地区的大量降水量径流。径流通过将污染物从城市表面带走而成为城市地区的众多关切问题，从而构成了主要的污染源。人们还通过观察径流对城市下游和周边地区河流和湖泊的负面影响，进一步关注径流的质量，尤其是在没有降雨后出现的早期降雨中。径流污染的增加会引起有机冲击，从而使常规的废水处理系统（如活性污泥）变得异常。电凝（电化学过程）是一种有效，快速的处理水溶性盐的方法。本研究旨在研究反应时间，电压和pH值对减少从伊朗Torbat-e Heydarieh繁忙的城市街道表面收集的径流的COD水平的影响。研究结果表明，该过程能够消除在最佳条件下（反应时间为60分钟，pH为10.4，电压为30伏），COD，BOD和浊度的最大效率分别为80％，82％和92％。但是，对于驼峰之前，广场附近区域和主要街道边界之前采集的各种样本，此最大去除量是不同的。研究反应时间变量可确定在最初的15分钟内在10伏特下去除了大部分的COD。此外，据报道在20伏特时金属消耗的最高水平为0.9 g / cm。这项研究表明，电凝可以作为城市径流的预处理方法，然后再输送到常规废水处理过程或接收水。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号