[1]范波,黄鹏,孙永利,等.城市水体雨后污染特征及降雨污染快速净化对策[J].中国给水排水,2024,40(13):115-121.
　FANBo,HUANGPeng,SUNYong-li,et al.Characteristics of Urban Water Bodies Pollution Following Rainfall and Strategies for Rapid Purification of Rainfall Pollution[J].China Water & Wastewater,2024,40(13):115-121.
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城市水体雨后污染特征及降雨污染快速净化对策

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: 115-121 栏目: 出版日期: 2024-07-01
Title:
Characteristics of Urban Water Bodies Pollution Following Rainfall and Strategies for Rapid Purification of Rainfall Pollution
作者:
范波， 黄鹏， 孙永利， 张玮嘉， 李鹤男， 刘茜， 李檬， 田腾飞， 赵青
（中国市政工程华北设计研究总院有限公司，天津 300074）
Author(s):
FAN　Bo， HUANG　Peng， SUN　Yong-li， ZHANG　Wei-jia， LI　He-nan， LIU　Qian， LI　Meng， TIAN　Teng-fei， ZHAO　Qing
（North China Municipal Engineering Design & Research Institute Co. Ltd.， Tianjin 300074， China）
关键词:
降雨污染;  城市水体;  返黑返臭;  管道沉积物;  快速净化
Keywords:
rainfall pollution;  urban water body;  re-formation of black and odorous water body;  pipeline sediment;  rapid purification
摘要:
我国城市排水管道旱季颗粒物沉积严重，降雨期间在雨水冲刷作用下沉积污染物再悬浮进入水体，是导致城市水体返黑返臭的主要原因。降雨过程中，通过对某城市河道及入河排口的跟踪监测和实验，分析了城市水体雨后水质变化规律及污染特征，发现雨后河道溶解氧（DO）和氧化还原电位（ORP）均达到重度黑臭程度。三维荧光光谱显示，雨水排口降雨污染中的有机物以芳香蛋白类物质和微生物代谢产物为主，主要来源于生活污水和管道沉积微生物。排口出流沉降实验表明，雨水排口降雨污染具有颗粒物浓度高及易沉降的特征，沉降过程分为三个阶段，前5 min，对SS、COD、TP、TN的去除率可分别达到69.01%、32.54%、45.54%、28.55%，NH4+-N和PO43--P等溶解性污染物浓度无明显变化。基于上述特征，降雨污染快速净化方案需以去除颗粒物为核心，并应满足停留时间短、处理效率高、可间歇运行及快速启动等要求。
Abstract:
The deposition of particulates in urban drainage pipes is particularly severe during the dry season in China. The sediment is then flowed into the water body due to rainwater erosion during rainfall, which is the primary cause for re-formation of black and odorous urban water bodies. During the process of rainfall, the water quality and pollution characteristics of urban water bodies were analyzed through tracking monitoring the urban river channels and outlets. It was observed that the dissolved oxygen (DO) and oxidation-reduction potential (ORP) of river channels reached severe black and odorous degree after rain. The three-dimensional fluorescence spectra revealed that the organic substances in the rainwater pollution were predominantly aromatic protein compounds and microbial metabolites, originating mainly from domestic sewage and microorganisms deposited in pipes. The experiment on sedimentation of outlet flow indicated that the rainfall pollution in the rainwater outlet was characterized by high suspended solids and easy sedimentation. The sedimentation process could be divided into three stages. Within the first 5 minutes, the removal rates of SS, COD, TP, and TN reached 69.01%, 32.54%, 45.54% and 28.55%, respectively. However, there was no significant change in dissolved pollutants such as NH4+-N and PO43--P. Based on the aforementioned characteristics, rapid purification scheme of rainfall pollution should focus on the removal of particulate matters as the core, while also meeting requirements for short hydraulic retention time, high treatment efficiency, intermittent operation, and fast start-up.
更新日期/Last Update: 2024-07-01