WANG Jian,LIU Guo-hua,QI Lu,et al.Research Progress in Material Transformation between Sediment and Sewage in Urban Drainage Pipeline[J].China Water & Wastewater,2021,37(24):34-44.
城市排水管道沉积物与污水间物质转移转化研究进展
- Title:
- Research Progress in Material Transformation between Sediment and Sewage in Urban Drainage Pipeline
- Keywords:
- drainage pipes; sediments; sewage; microorganisms; material conversion
- 摘要:
- 城市排水管网是收集、输送污水的重要环节。由于水力条件以及降雨冲刷的影响，排水管道底部极易沉积沉积物，而污水以及沉积物中含有丰富的营养物质而且赋存有大量微生物，致使管道污水以及沉积物中存在各种复杂的物理、生化等反应，易引发沉积物与污水之间的物质转移转化。沉积物和污水之间主要存在污染物物理沉积、生物转化吸附和生物转化释放三种物质交换途径，由此会造成管道淤积堵塞、有毒有害气体释放、管道腐蚀以及污水处理厂碳源不足等危害。首先综述了城市排水管网中沉积物的产生规律及构成特征，而后进一步分析了沉积物与污水之间的物质转化规律、影响因素和机制,以及由此造成的影响和危害，并对我国排水管道中沉积物和污水之间的相关研究提出了期望。
- Abstract:
- Urban drainage pipe network plays a very important role in urban sewage collection and transport. Due to the influence of hydraulic conditions and rainfall erosion, sediments are easy to deposit at the bottom of the drainage pipeline. And sewage and sediments are rich in nutrients and host a large number of microorganisms, which is prone to inducing complex physical and biological reactions, thus cause material transfer and conversion between the sediment layer and sewage. Physical deposition, biological transformation adsorption and biological transformation release of pollutant are three main kinds of transfer and conversion ways, which result in many harms such as pipeline silting and blocking, the release of toxic and harmful gases, pipeline corrosion, carbon source loss, etc. This paper summarized the production law and composition characteristics of sediments in urban drainage pipelines, as well as the material transfer and conversion law, effect factors, mechanism, and harms. Finally, the research related to the transfer and conversion between the sediment layer and the sewage of drainage pipeline in China was suggested.
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