直接过滤可分为不加注药剂过滤和加注药剂经快速搅拌后再过滤两种。前者称作不加药过滤,后者称作微絮凝过滤。不加药过滤以浊度100度左右的原水过滤20小时的结果见表1。不加药过滤(滤层厚60厘米)的试验结果 Direct filtration can be divided into two types: non-injection drug filtration and drug injection after rapid stirring and then filtration. The former is called no-drug filtration and the latter is called micro-flocculation filtration. The results of filtration without raw water filtered by raw water with a turbidity of about 100 degrees are shown in Table 1. No drug filtration (filter thickness 60 cm) test results