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近几年来,发展了一个新的水质参数——污染指数(Fouling Index FI),也可称为凝积密度指数(Silt Density Index SDI)。在1975年的第36届国际水处理会议上将污染指数测定,定为微孔试验中的标准方法。它主要是检测水中胶体和悬浮物等微粒的多少,比普通的浊度仪更为灵敏准确。污染指数测定是在一定压力和标准间隔时间内,一定体积的水样通过一微孔过滤器(0.45μm)的阻塞率。凡大于0.45μm微粒、胶体、细菌等全都被截留在膜面上。利用两
In recent years, a new water quality parameter, the Fouling Index (FI), has been developed, which can also be called the Silt Density Index (SDI). At the 36th International Water Treatment Conference in 1975, the pollution index was determined as the standard method in the micropore test. It is mainly used to detect the amount of colloids and suspended particles in water, which is more sensitive and accurate than ordinary turbidity meters. The pollution index is determined by the blocking rate of a certain volume of water sample passing through a microporous filter (0.45 μm) within a certain pressure and standard interval. All particles larger than 0.45μm, colloids, bacteria, etc. are all trapped on the membrane surface. Use two