0　引言目前 ,山东省各地表水源净水厂大多采用传统的混凝 -沉淀 -过滤 -消毒四段工艺 ,其作为水源的水库、湖泊大部分属低温低浊水源 .这种四段工艺在处理低温低浊水时 ,其沉淀工艺难以起到理想的作用 [1 ] ,特别是在冬季低温时 ,即使加大药耗也无济于事 ,有时反而会出现沉淀 0 Introduction At present, most of the surface water source water purification plants in Shandong Province use the traditional four-stage coagulation-sedimentation-filtration-disinfection process, most of which are water reservoirs and lakes belong to the low temperature and low turbidity water source. Low temperature and low turbidity water, the precipitation process is difficult to play an ideal role [1], especially in the winter when the temperature is low, even if the increase in consumption is not helpful, and sometimes there will be precipitation