It is difficult to treat surface water with low turbidity, high color and abounding organic matter by coagulation, and coagulation and dissolved air flotation (DAF) process is used to treat this raw water.

• 低浊高色富含有机物地表水难于混凝,试验采用“混凝-溶气气浮”(“混凝-DAF”)工艺处理此类水,并与常规“混凝-沉淀”工艺进行了比较。