城市居民生活污水污染物沉积衰减规律及影响  

Deposition and Attenuation Law of Pollutants in Urban Residential Domestic Sewage and Its Impact

作　　者：高晨晨 孙永利 穆莹 刘钰 王诣达 李思雨 王金丽 葛铜岗 GAO Chen-chen;SUN Yong-li;MU Ying;LIU Yu;WANG Yi-da;LI Si-yu;WANG Jin-li;GE Tong-gang(North China Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300074,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《中国给水排水》2023年第3期67-72,共6页China Water & Wastewater

基　　金：国家重点研发计划项目(2022YFC3203204)。

摘　　要：城市污水管网的运行流速是影响污染物收集处理效能的重要因素。为分析污水在管网输送过程中受沉积作用的影响,以居民源头排放的生活污水为对象,研究污水在较不利流态条件下污染物的沉积衰减规律。结果表明,按照输送距离测算,当沉积时间为10 h时,污水中SS、COD和TP浓度分别下降了61.1%、18.2%和9.3%,NH_(3)-N浓度提高了8.7%,导致COD/TN、COD/NH_(3)-N、COD/TP和COD/PO_(4)^(3-)-P分别降低了19.9%、24.8%、11.9%和18.0%。由此可见,污水输送过程中污染物的沉降淤积是导致污水处理厂进水浓度偏低、碳氮比失调的重要原因,建议充分考虑管网运行工况对污染物收集处理效能的综合影响。The flow velocity of urban sewage sewer network is an important factor affecting the efficiency of pollutant collection and treatment.To analyze the influence of deposition on sewage transportation in the sewer system,this paper investigated the deposition and attenuation law of pollutants in domestic sewage discharged from residential sources under unfavorable flow conditions.According to the transportation distance,the deposition time was 10 hours.The concentrations of SS,COD and TP in sewage decreased by 61.1%,18.2%and 9.3%,respectively,while NH_(3)-N concentration increased by 8.7%.As a result,the COD/TN,COD/NH_(3)-N,COD/TP and COD/PO_(4)^(3-)-P decreased by 19.9%,24.8%,11.9%and 18.0%,respectively.Therefore,the deposition of pollutants in the sewage transportation process was an important cause for the low influent concentration and imbalance of C/N ratio in the sewage treatment plant.It is suggested to fully consider the comprehensive influence of sewer network operating conditions on the collection and treatment efficiency of pollutants.

关 键 词：生活污水污染物 污水管网 沉积衰减 污染物收集量 进水浓度 提质增效 

分 类 号：TU992[建筑科学—市政工程]