青岛市团岛排水系统污水水质水量波动特征解析

为探究青岛市团岛片区排水系统中污水流量与污染物变化规律,对该片区3个典型居民区排水管网中的污水流量和水质指标进行了为期1年(2019年10月—2020年10月)的监测,并计算了污染物的产污系数、变异系数和相关性系数.结果表明,每 日污染物7:00浓度最高,这是由于夜间流量小使得污染物在管网内沉积,7:00流量增大冲刷管...

WASTEWATER QUANTITY AND QUALITY FLUCTUATION CHARACTERISTICS OF DRAINAGE SYSTEM IN TUANDAO,QINGDAO

The sewage flow and water quality indexes in the drainage pipe networks of three typical residential areas in the Tuandao region of Qingdao were monitored and measured for one year(from October 2019 to October 2020) to investigate the variation law of sewage flow and pollutants. The pollution production coefficient, variation coefficient, and correlation coefficient of the pollutants were calculated. The maximum daily pollutant concentration was mainly due to the low flow at night and pollutant deposition beginning at 7:00 am. At 7:00 am, the flow accelerated and scoured the pipe network, collecting high concentration pollutants. Pollutant fluctuation coefficients were observed less than 15%, indicating that the concentration was reasonably steady. The chemical oxygen demand(COD) pollution production coefficient was 108 g/(person·d), which was much higher than in the similar cities. The correlation coefficient between wastewater flow and COD, biochemical oxygen demand(BOD₅), and suspended solid(SS) was high and indicated a strong synergistic tendency. However, there was no significant link between NH₄+-N and total nitrogen(TN). This research provided an appropriate collection of data on the changing laws of wastewater flow and quality in the Qingdao Tuandao drainage system for process design and operation management of municipal wastewater treatment plants.