强化混凝用作土地处理系统预处理的生产性试验

Study on Coagulation and Sedimentation as Pretreatment Process in Soil Treatment System

通过生产性试验考察了混凝沉淀技术作为土地处理系统预处理工艺的可行性。结果表明,混凝沉淀有效降低了人工快渗池的污染物负荷,保障了整个系统的出水水质,其对COD、SS、TP的平均去除率分别达到了55.6%、82.8%和56.5%;试验中人工快渗工艺的水力负荷达2.25 m/d,大大降低了人工快渗系统的占地面积;混凝沉淀工艺与人工快渗工艺相互补充,技术搭配理想。

The technical and economical feasibility of utilizing coagulation and sedimentation as a pretreatment process in the soil treatment system was investigated with productive experiments. The results show that coagulation and sedimentation reduce contamination loads effectively, ensuring the outlet water quality, in which the removal rates of COD, SS, TP are 55.6% , 82.8% and 56.5% respectively. The hydraulic load of the soil treatment system increases enormously to as much as 2.25 m/d in experimental conditions, which greatly decreases the area of the constructed rapid infiltration system. The coagulation-sedimentation process and constructed rapid infiltration process complement each other, forming an ideal combination system.