污水管网高水位运行工况下的截污方案探讨

黑臭在水里,根源在岸上,关键在排口,核心在管网,控源截污是黑臭水体治理的核心工程措施。在对污水管网运行水位观测和调研的基础上,发现了污水管网处于高水位运行的不正常工况,对污水管网高水位运行的原因和严重后果进行了剖析。通过对雨污水管网进行反复的排查,查明排水系统拓扑关系、污水来源、管网运行水位、结构性缺陷、功能性缺陷等重要信息,掌握了雨污水管网的现状底数。在管网排查工作的基础上,针对污水管网高水位运行的客观条件,提出了污染源整改、防倒灌设施改造、泵站主动降水位、新增污水处理能力降水位等4种控源截污方案,解决了鸭尾溪、白沙河、海甸沟治理工程的控源截污难题,取得了优异的治理效果,河道水质达到《地表水环境质量标准》(GB 3838—2002)Ⅲ～Ⅴ类标准。

Discussion on sewage interception under high water level operating condition of sewage system

Black odor is in the water,the root is on the shore,the key is in the sewage outlet, the core is in the sewage,and sewage interception is the core engineering measure for the remediation of black-and-malodorous water body.Based on the observation and investigation of the water level of the sewage system,The abnormal working condition of the sewage system at high water level is found,and the causes and serious consequences of the high water level operation of the sewage system are analyzed.Through repeated investigations on the rainwater system and sewage system, the important information such as the topological relationship of the drainage system,the source of the sewage,the water level of sewage system,structural defects,and functional defects were identified,and the current status base of the drainage system was mastered.On the basis of the investigation of sewage system,aiming at the objective conditions of the high water level operation of the sewage system,four sewage interceptions such as pollution rectification,anti-backflow facility renovation,active decline water level by pumping station,and active decline water level by new sewage treatment capacity were proposed.The scheme solves the problem of sewage interception of Yaweixi River,Baisha River and Haidiangou River treatment projects,and achieves excellent treatment effects,the river water quality meets the ClassⅢ~Ⅴ standard of Environmental quality standards for surface water(GB 3838-2002).