SILT DENSITY INDEX TEST KIT

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Silt Density Index Test Kit

Industrial Water Equipment Silt Density Index (SDI) Test Kit, designed to test the measurement of fouling within RO and Nanofiltration Membranes.

Suspended solids within feed water is one of the main problems when dealing with RO membrane fouling. The SDI Test kit is able to calculate the degree of fouling by exposing a 0.45-micron filter to the feed water under pressure.

In order to measure the degree of this fouling problem, a concept called Silt Density Index is used. Here filtration rates are calculated by exposing a 0.45-micron filter to the feed water under pressure.

An SDI of less than 5 is typically considered acceptable for reverse osmosis systems. This means membranes should foul at a very low rate at SDI values of less than 5. Although this concept works most of the time, there are exceptions when a lower SDI (less than 3) is desirable due to the nature of the suspended solids in the feed water.

Key Treatment Parameters Included