What is SDI?
Silt Density Index (SDI) is a measure to assess the fouling in water purification systems from Suspended solids and colloidal materials. When it comes to reverse osmosis membranes, suspended solids within the water can cause problems. Then these levels get high, it can cause fouling of the membrane. This will lead to:
Increased cost for maintenance
Reduced lifetime
In...
Silt Density Index (SDI) is a test used to determine the levels of colloidal and particulate suspended solids in the feedwater to reverse osmosis (RO) systems. This in turn will enable you to estimate the fouling potential. This measurement is of importance as it can be used to predict the lifetime of the RO membrane. This can help save time and money. It is measured following the test...
What is Reverse Osmosis and how do I test the water?
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OSMOSIS
Osmosis is the phenomenon of lower dissolved solids in water passing through a semi-permeable membrane into higher dissolved solids water until a near equilibrium is reached. Reverse Osmosis (RO) is a membrane process of purific...
Measuring the conductivity of clean water is a challenging application. Really pure forms of water such as those produced by reverse osmosis water systems have conductivity so low it is actually measured in resistivity. These reverse osmosis systems use a combination of membranes and cartridges to purify the water, which from time to time require replacement.
Systems usually feature built in...
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