-
2015年4月,国务院颁布《水污染防治行动计划》(水十条),确定我国水污染防治目标[1]:即2017年底前,直辖市、省会城市、计划单列市建成区基本消除黑臭水体;到2020年,地级及以上城市建成区的黑臭水体均控制在10%以内;到2030年,城市建成区黑臭水体总体消除。2015年9月,住建部发布《城市黑臭水体整治工作指南》(“工作指南”),提出“控源截污、内源治理;活水循环、清水补给;水质净化、生态修复”是城市黑臭水体整治的基本技术路线[2-3]。
暴雨径流产生的城市面源污染是城市水体重要污染源,污染负荷可占10%以上[4]。暴雨初期雨水流量大,且往往含有大量污染物[5-6]。城市排水管网建设和改造滞后,许多老城区排水管网难以进行分流制改造,使得许多城市将长期面临城市面源导致的水体污染问题。以黑臭水体治理为目标,开发针对城市面源初期雨水的快速高效一体化设备,尽可能削减入河污染负荷,对于维持城市河湖水体水质安全和水生态功能具有重要意义。
超磁分离即在污水中投加磁性物质,使不带磁性的污染物被赋予磁性,再通过磁性设备实现固液分离,达到水体净化的目的。笔者团队基于超磁技术,自主研发了超磁分离水体净化技术和成套设备,在国内多个黑臭水体治理工程中得到成功应用。本文介绍超磁分离装备的技术原理和设备概况,通过梳理其在黑臭水体治理各环节的应用工程,总结了其停留时间短、净化效率高、容积负荷高、高度集成化等工艺特点。该技术在实际工程应用中可因地制宜设计、快速投产应用,可为河湖水体质量改善、功能恢复和水生态健康提供参考。
Application case of ReCoMag technology in the polluted urban rivers control
- Received Date: 07/09/2020
- Available Online: 10/09/2021
-
Key words:
- ReCoMag technology /
- the polluted urban rivers /
- water quality improvement /
- case study
Abstract: ReCoMag technology is a water quality purification technology, and the principle is: by adding magnetic substances in sewage, non-magnetic pollutants becomes magnetic. Through ReCoMag separation equipment, the solid pollutant will be separated from the liquid one. The magnetic substances take away the pollutants from the water, and so the purification is achieved. Through analyzing the principles and technological strengths about ReCoMag technology, the author of this article wants to explore the application of this technology in the polluted urban rivers control and to set the basic rules of the technology. Through analyzing the whole process of application of ReCoMag technology in polluted urban rivers control, the author collects case studies of different areas and shows the advantages and disadvantages of this technology. The advantages of this technology are high efficiency, less land occupying, shorter construction period, easier maintenance, while the disadvantages are poorer biodegradability of effluent, inefficiency of purification in certain indicators such as Ammonia nitrogen, total nitrogen, dissolved organic matter, etc. This article lists cases for the application of ReCoMag technology in the polluted urban rivers control and exploits new technology in polluted water containment.