基于水质水量特征分析的服务区污水管理

The Research of Expressway Service Area Sewage Management Based on Water Quality and Quantity

随着高速公路出行频率的迅速上升,人流车流量的快速扩张,公路服务区每天污水排放量可达17万m3,服务区污水处理及回用已成为制约公路节能减排的重要因素。在对14条公路服务区污水处理设施进行调研的基础上,选择G56杭瑞高速路某服务区排放污水的水量水质进行24小时连续监测。结果表明:①该服务区CODcr浓度范围为629-1562 mg/L,平均浓度为874.3mg/L,标准偏差为95;氨氮的浓度范围为42-70 mg/L,平均浓度为58mg/L,浓度标准偏差为11。该服务区污水属于高浓度CODcr高浓度氨氮生活污水。②监测当日该服务区污水最大流量为9.3m3/h,平均小时流量为6.3m3/h,流量标准偏差为2,污水时变化系数为1.48,服务区车流量和污水排放量的相关系数为0.66。③基于水质水量特征分析的服务区污水管理可为污水处理工艺、设备选型提供主要依据,是服务区污水回用标准编制的客观需求,同时也为公路建设环境影响评价及其环境管理提供重要技术支撑。

As the increase frequency of highway travel,the people stream and vehicle flow undergo a period of rapid expansion,the daily sewage discharge of the highway service areas is about 170 thousand,the wastewater disposal and reuse has become the significant factors to affect the highway conserving energy and reducing emissions.Based on the research to the 14 freeway service area sewage disposal systems,the one service area in G56 Hangrui freeway is selected to conduct 24h quality and quantity wastewater monitoring.The results show that(1) the service area wastewater CODcr concentration range is 629-1562 mg/L,mean value is 874.3mg/L,the standard deviation of the CODcr concentrations is 95;NH3-N concentration range is 42-70 mg/L,mean value is 58mg/L,the standard deviation of the NH3-N concentration is 11.The wastewater discharge from the service area is domestic sewage with high concentration of CODcr and NH3-N.(2)In the monitoring day,the maximum service area sewage flow is 9.3m3/h,mean value is 6.3 m3/h,the standard deviation of the sewage flow is 2,the wastewater hourly variation coefficient is 1.48,and the correlation coefficient between the service area traffic flow and the sewage quantity is 0.66.(3) The service area sewage management based on the feature analysis of wastewater quantity and quality can provide primary standards to the choice of sewage treatment technology and disposal equipments,it is also the objectivity demand to compile the service area sewage reuse standards,further the important support to the freeway construction environmental impact assessment and regulation would also be supplied.