[1]罗坤,孙凌凯,马方凯,等.基于水质水量监测的污水管网评估诊断与定量分析[J].中国给水排水,2024,40(13):109-114.
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基于水质水量监测的污水管网评估诊断与定量分析

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第13期 页码: 109-114 栏目: 出版日期: 2024-07-01
Title:
Evaluation, Diagnosis and Quantitative Analysis of Sewage Pipe Network Based on Water Quality and Quantity Monitoring
作者:
罗坤1,2， 孙凌凯1,2， 马方凯1,2， 吴从林1,2
（1.流域水安全保障湖北省重点实验室，湖北 武汉 430010；2.长江勘测规划设计研究有限责任公司，湖北 武汉 430010）
Author(s):
LUO　Kun1，2， SUN　Ling-kai1，2， MA　Fang-kai1，2， WU　Cong-lin1，2
（1. Hubei Key Laboratory of Basin Water Security， Wuhan 430010， China； 2. Changjiang Survey， Planning， Design and Research Co. Ltd.， Wuhan 430010， China）
关键词:
污水系统;  管网排查;  水质水量监测;  入流入渗;  评估诊断;  定量分析
Keywords:
sewage system;  pipe network inspection;  water quality and quantity monitoring; inflow infiltration;  evaluation and diagnosis;  quantitative analysis
摘要:
为快速掌握长江中下游某城市污水系统的运行状况，对中心城区污水处理厂服务范围内8个污水分区进行管网节点的水质水量监测与分析。通过理论污水量与实际监测流量的对比，发现污水处理厂进水量为理论污水量的1.62倍，表明该污水系统存在外水入渗情况。采用化学需氧量和硬度作为水质特征指标，对8个污水分区的旱天外水入渗量进行解析，发现2#和4#污水分区的旱天外水入渗情况最严重，入渗量分别为19 115.36和12 772.25 m3/d。进一步对比各污水分区的旱、雨天流量，分析雨天外水入流情况，发现2#污水分区在17.8 mm降雨量条件下，单位面积降雨入流量达到2 933.34 m3/km2，表明2#污水分区存在严重的雨污混接问题。通过开展基于水质水量监测的污水管网评估诊断，能够实现管网问题的快速定位，确定管网精细排查与缺陷检测目标靶区，提高管网检测效能。
Abstract:
To quickly assess the operational status of a municipal sewage system in the middle and lower reaches of the Yangtze River, the water quality and quantity at pipe network nodes in 8 sewage zones within the service area of the central city’s wastewater treatment plant (WWTP) were monitored and analyzed. By comparing the theoretical sewage flow with the actual monitoring flow, it was determined that the inflow of the WWTP was 1.62 times the theoretical sewage flow, indicating external water infiltration in the sewage system. Using chemical oxygen demand and hardness as indicators of water quality, the infiltration of external water on dry days was analyzed in 8 sewage zones. It was determined that the infiltration on dry days was most severe in sewage zones 2# and 4#, with flows reaching 19 115.36 m3/d and 12 772.25 m3/d, respectively. Through further comparison of the flows during dry and wet days in each sewage zone, as well as analysis of the inflow of external water on rainy days, it was determined that the rainfall inflow per unit area reached 2 933.34 m3/km2 under a rainfall condition of 17.8 mm, indicating a significant issue of rainwater and sewage mixing in sewage zone 2#. Through the evaluation and diagnosis of sewage networks based on water quality and quantity monitoring, rapid identification of network problems, determination of target areas for detailed investigation and defect detection, improvement in network detection efficiency can be achieved.

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更新日期/Last Update: 2024-07-01