雅安市青衣江流域乡镇污水处理情况的研究

通过对青衣江流域周公河、陇西河支流现有的25个乡镇一体化小型污水站运行情况进行水环境质量监测,用实验室方法分析其中水温、pH、CODCr、 BOD5、悬浮物、氨氮(以N计)、总磷(以P计)等项目,进一步了解乡镇污水站的运行状况和污水处理效果.调查研究表明:25个乡镇污水站处理排放达标率均值不足40％,处理效果从高到低依...

Study on Sewage Treatment in Villages and Towns in Qingyi River Basin of Ya'an City

In this study,the water environment quality of 25 integrated small-scale sewage stations in the tributaries of Zhougong River and Longxi River in Qingyi River Basin was monitored,and the water temperature,pH,COD_Cr,BOD₅,SS,NH₃-N(n),T-P(P)and other items were analyzed by laboratory methods,so as to further understand the operation status and sewage treatment effect of township sewage stations.The investigation results showed that the average rate of the 25 township sewage stations reaching the standard is less than 40%,and the treatment effect from high to low is SS>COD_Cr>TP>NH₃-N.The COD_Cr and NH₃-N treatment efficiency of Anaerobic+biological contact oxidation treatment station is significantly better than that of anaerobic treatment station.The suspended solids treatment efficiency of 11 treatment stations with constructed wetland mode was better than that of 14 treatment stations without constructed wetland mode.The research results provide effective scientific data for the management department,and put forward effective suggestions for strengthening the operation of the sewage stations in the later stage.