摘要
【目的】文章研究感潮河网区内河涌水倒灌的机理及处置对策,旨在解决珠三角地区因潮汐、雨水径流等因素导致的污水收集效能低下、污水处理厂进水浓度降低以及河涌水环境质量差等问题。【方法】通过对广东省佛山市感潮河网区的实地调研,分析河涌水位变化、外水入渗来源以及倒灌口的分布特征。结合排水系统现状对倒灌口进行分类与路径梳理。【结果】识别出六类倒灌口,并提出了针对性的整改路线,实施后,污水厂进水五日生化需氧量(BOD_(5))质量浓度由59.42 mg/L显著提高到71.42 mg/L,河涌水质得到改善。【结论】经工程实例验证,揭示河涌水倒灌三大成因:排水系统错接混接、合流制截污系统倒灌以及合流制暗涵截污系统倒灌。据此提出摸清底数和分类整改路线,有效阻断河涌水进入污水系统,提高污水处理厂进水浓度,为感潮河网区的水环境治理提供了可行的技术路径。
[Objective]This study aims to investigate the mechanisms and mitigation strategies of river backflow in Tidal River network areas,aiming to address problems in the Pearl River Delta region such as low wastewater collection efficiency,reduces influent concentrations at wastewater treatment plants(WWTPs),and poor river water quality caused by tides,rainwater runoff,and other factors.[Methods]Field investigations were conducted in the Tidal River network area of Foshan City,Guangdong Province.River water level fluctuations,sources of external water infiltration,and the spatial distribution of backflow inlets were analyzed.The existing drainage system was examined to classify the backflow inlets and trace their flow paths.[Results]Six types of backflow inlets were identified,and targeted mitigation routes were proposed.After implementation,the influent five-day biochemical oxygen demand(BOD_(5))mass concentration at the WWTP increased significantly from 59.42 mg/L to 71.42 mg/L,and river water quality improved.[Conclusion]Engineering case studies reveal three primary mechanisms of river backflow:misconnections in the drainage system,backflow in combined sewer interception systems,and backflow in intercepted culvert systems under the combined sewer system.Accordingly,conducting a thorough investigation to obtain detailed pipeline data and implementing classified rectification strategies can effectively reduce the intrusion of river water into the wastewater system,improve influent concentration at WWTPs.These findings provide a feasible technical pathway for water environment management in Tidal River network areas.
作者
邓琳
彭志伟
张印
林宏城
梁显源
DENG Lin;PENG Zhiwei;ZHANG Yin;LIN Hongcheng;LIANG Xianyuan(CSCEC Aecom Consultants Co.,Ltd.,Lanzhou 730000,China;Guangdong New Source Environmental Technology Co.,Ltd.,Foshan 528000,China)
出处
《净水技术》
2025年第S2期117-121,131,共6页
Water Purification Technology
基金
中国市政工程西北设计研究院有限公司科技计划(XBSZKY2223)。
关键词
截污系统改造
雨污分流改造
防倒灌改造
防倒灌路径
提质增效
reconstruction of the wastewater interception system
rainwater and wastewater separation reconstruction
anti-backflow reconstruction
anti-backflow pathway
development of quality and efficiency improvement
