基于污水主干管水质沿程时空变化的外来水入流入渗分析

Analysis of inflow and infiltration based on temporal and spatial variation of water quality along the main sewage lines

以六安市东城、经开污水处理厂服务范围内三条排污主干管为研究对象,通过污水干管沿程布点进行多种水质指标连续监测的方法对管内水质时空变化规律进行研究。以管道沿程水质平均下降率作为管段外来水入流入渗风险的定量识别指标,共得到4条沿程水质显著降低的管段,预诊断为入流入渗高风险管段。结合该4条线路的管道内窥检测结果,发现4条水质下降段共存在80处不同等级的渗漏点,并且其渗漏缺陷发生率与沿程水质平均下降率显著相关,研究结果表明通过污水干管沿程水质监测的方法能够实现对管道外来水入流入渗状况的诊断分析。

Taking the three main sewage lines in the service scope of Dongcheng and Jingkai sewage treatment plants in Lu'an city as the research area,the temporal and spatial changes of water quality in the pipes were investigated by means of continuous monitoring of various water quality indexes.According to the results,the average decline rates of water quality along the pipes were taken as the quantitative index of the inflow and infiltration risk,and a total of four pipe sections were identified as high inflow and infiltration risk pipelines.Through the QV and CCTV inspection results,it is found that there are 80 leakage points in the four pipe sections,and the incidence of leakage defects is significantly related to the average decline rate of water quality along the pipeline.Therefore,it is demonstrated that the method of water quality monitoring along the main sewage pipe can realize the diagnosis and analysis of the inflow and infiltration in the sewer system.