双水源对置供水管网水力交界区的水质特点研究  

Research on the water quality characteristics of the water distribution interface of the water supply pipe network with opposite water sources

作　　者：徐小燕 霍冉冉 董晓晨[1] 周婷 赵红军 周佰勤 李惠平 XU Xiaoyan;HUO Ranran;DONG Xiaochen;ZHOU Ting;ZHAO Hongjun;ZHOU Baiqin;LI Huiping(Suzhou Industrial Park Qingyuan Hong Kong&China Water Co.,Ltd.,Suzhou 215021,China;School of Municipal and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]苏州工业园区清源华衍水务有限公司,苏州215021 [2]哈尔滨工业大学(深圳)土木与环境工程学院,深圳518055 [3]同济大学环境科学与工程学院,上海200092

出　　处：《给水排水》2024年第3期125-133,共9页Water & Wastewater Engineering

摘　　要：采用多水源供水模式的管网系统对供水水质会造成一定影响,该模式下供水交界区域的动态变化规律及其水质安全问题需得到重点关注。对苏州市某区域具有代表性对置供水管网水力交界区的饮用水水质进行了为期1年的取样分析,主要考察了溶解性有机物(DOM)在管网中的变化特征以及余氯与消毒前体物质的反应规律。结果表明,X水厂原水中含有更多易于与余氯反应的含溴前体物,而Y水厂则含有更多氯代前体物,由此导致二溴一氯甲烷(DBCM)和三溴甲烷(TBM)则在接近于X水厂的D-10点达到最大浓度,三氯甲烷(TCM)和一溴二氯甲烷(BDCM)则在接近于Y水厂的D-12点达到最大浓度。此外,温度是影响余氯浓度变化及其与消毒副产物前体物反应效率的主要因素,6至9月份供水交界面处的余氯浓度显著低于其余月份,而三卤甲烷浓度高于其余月份。由于原水水质差异以及管网供水量随用户需水量发生变化,采用双水源对置供水系统的供水交界区管网水质风险高于其他管段,对该区域的水质安全需重点关注。In a two-source water distribution system(WDS),the water quality of the water supply would be affected by the pipe network system.Therefore,the dynamic changes in the water distribution interface under this mode and the water quality safety issues need to be paid more at-tention to.In this study,a one-year sampling and analysis of drinking water quality in the water distribution interface of a two-source WDS of Suzhou city was conducted,and the change characteristics of dissolved organic matter(DOM)in the pipeline network and residual chlorine reaction with disinfecting precursors were mainly investigated.The results showed that the raw water from Plant X contained more bromine-containing precursors that easily reacting with residual chlorine,while Plant Y contained more chlorinated precursors,which resulted that the maximum dibromo-monochloromethane(DBCM)and tribromomethane(TBM)concentration was observed at point D-1o,which was close to the X water plant,and the maximum concentration of trichloromethane(TCM)and monobromodichloromethane(BDCM)reached at the point D-12(close to the Y water plant).In addition,temperature was the main factor affected the concentration change of residual chlorine and its reaction efficiency with DBPs.From June to September,the residual chlorine concentration at the interface of the water supply was significantly lower than that of the other months,while the concentration of trihalomethane was higher than that of the other months.Due to the difference in raw water quality and the changes in the water supply volume of the pipeline network with the user's water demand,the water quality risk of the pipeline network in the water distribution interface of the dual water source opposed water supply system was higher than that of other pipeline sections,and the water quality safety of this area needs to be paid attention to.

关 键 词：双水源供水 水质保障 供水交界区 三维荧光 余氯 消毒副产物 

分 类 号：TU991[建筑科学—市政工程]