城市污水管网中污染物转化规律的模拟研究  

Simulation Study on Transformation of Pollutants in Urban Sewer Network

作　　者：王宝宝[1] 金鹏康[1] 郝晓宇[1] 郭海泉[1] 王晓昌[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2015年第15期24-27,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07313001);陕西省科技统筹创新工程计划项目(2011KTZB03-03-03);新世纪优秀人才支持计划项目(NCET-12-1043);陕西省创新团队项目(IRT2013KCT-13)

摘　　要：污水在管网中停留时间较长,由于管壁生物膜作用,其水质会发生一定的变化。以人工配水为原水,在室温条件下采用长为1 200 m的PVC管反应器模拟城市污水管道的运行特性。结果表明,在温度为(26±2)℃、溶解氧为(0.1±0.05)mg/L的条件下,流经1 200 m的管段后,对SCOD、NO-3-N的去除率分别为34%、77%,氨氮浓度升高了25%,而总磷浓度变化不大。可见,污水经过管网后会进一步降低C/N值,将对下游污水处理厂的脱氮效果产生不利影响。Wastewater which remained in pipeline system for longer periods of time could be affected to some extent by the action of the wall biofilm. Experiments were performed in the PVC pipeline reactor at room temperature, which was 1 200 m long and fed with synthetic wastewater. The performance of the pipeline system was simulated under the following conditions： temperature was （26 ± 2 ） ℃ and DO was （0.1 ±0.05 ） mg/L. The results showed that the removal rates of SCOD and NO3 - N for synthetic wastewater were 34% and 77% , respectively. But the concentration of NH3 - N was increased by 25 % and the concentration of TP had no marked change. It was concluded that after flowing through the pipeline system, the C/N ratio of the wastewater was further reduced, which could negatively affect the nitrogen removal efficiency in the downstream WWTPs.

关 键 词：污水管网 C/N值 污染物转化 污水水质 

分 类 号：X703[环境科学与工程—环境工程]