南方城市污水处理系统效能评估与提质增效策略制定

Efficiency evaluation of a sewage system and strategy formulation of quality and efficiency improvement in city of Southern China

以华南地区某污水处理厂为例,依据排水分区进行水量水质效能评估,结果表明污水处理厂服务范围的主要问题为管网建设不完善与污水系统外水入侵严重,晴、雨天重点片区外水入渗率分别达21%、54%。结合管网排查资料,确定各分区主次问题,提质增效的重点为清污分离。提出污水系统评价应水量和水质并举、整体和局部并重,才能有效识别污水系统提质增效的主攻方向,制定相应策略。

Taking a sewage treatment plant in south China as an example,the evaluation of water quality and efficiency was carried out according to the drainage zone.The results show that the main problem in the service scope is the incomplete construction and serious external water invasion of the sewage system,where the water infiltration rate accounts for 21%and 54%respectively in sunny and rainy days.Combined with the information of comprehensive drainage network investigation,the priority and severity of problems in each district are determined.The current focus of improving the quality and efficiency of urban system is to separate the clean water and the wastewater.It is suggested that we should pay attention to both water quantity and quality,both the whole and part in the evaluation of sewage system,so as to effectively identify the main direction for improving the quality and efficiency of the sewage system and formulate corresponding strategies.