Everything to Know About SDI Water
SDI water treatment in Cincinnati, OH is a process designed to reduce or remove suspended solids in the water to improve its quality and prevent side effects like corrosion.
The term SDI refers to silt density index, or a measurement of the total amount of suspended solids in the water. The SDI measurements help users determine the presence and number of substances that could lead to negative impacts. This index is frequently used on a large scale in water treatment plants.
Here’s a quick overview of everything you need to know about SDI and how to account for it in your water purification and filtration processes.
Reducing SDI in water
Reverse osmosis systems often have suspended solids in their feed water. Most of these systems feature some sort of disinfection, but these small solids will still be responsible for fouling and deterioration of the reverse osmosis membranes. The SDI measurements in reverse osmosis systems are important to determine the potential of the water to foul the membrane.
Higher levels of SDI indicate lower quality of water. At elevated levels, it becomes necessary to take appropriate action to reduce the amount of silt in the water, and the most common technology used to accomplish this is media filtration. Surface water that has a high SDI will use advanced water filtration systems and pre-screening to eliminate that SDI.
The most common types of filters used to remove organic substances are sand media filters. The size of the particles suspended in the water will influence the level of filtration required. When there are more than 100 ppm of silts in the water, low media flow rates will be used in filtration to lower the potential need for continuous backwashing, as filters require backwashing when pressure lowers to a significant degree.
Thorough ultrafiltration systems are capable of creating an extremely low level of SDI in water before the solids are fully removed with more advanced methods of water treatment. The ultrafiltration process involves the use of technologies to purify the lowest quality feed water in the reverse osmosis system and to eliminate unwanted contaminants such as TDS, sands, salts and various hard substances. Ultrafiltration as a sort of pre-treatment for reverse osmosis systems helps to prolong the life of those systems while also delivering higher quality filtration results.
There are many different industries that can benefit from the measurement and control of SDI, beyond just municipal water treatment facilities. Manufacturers, for example, often need highly purified water for their products and thus need to invest more heavily in methods of water purification. The same is often true for medical or pharmaceutical settings, which require extensive water filtration in some settings, especially laboratories.
Interested in learning more about measuring SDI in water and what you need to do to keep SDI levels under control? We encourage you to contact Ultra Pure Water Technologies today to discuss your industrial and commercial water purification needs in Cincinnati, OH. We will be happy to provide you with more answers to the deionized water FAQs we frequently receive from our clients.
Categorised in: Types of Water, Water Purification
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