Water Deionization 101Years ago, high purity water was used only in limited applications. Today, deionized (or "DI") high purity water has become an essential ingredient in hundreds of applications. Just a few include the following:
- Medical offices
- Pharmaceutical companies
- Cosmetics companies
- Large aquariums,fish tanks,and reefkeeping facilities
- Electronics manufacturing plants
- Food processing plants
- Plating and anodizing
- And even the final rinse at the local car wash!
Several years ago, I tried to explain this to a plant manager, but he insisted that he just wanted DI and decided to go with another company who was only too happy to do that. When the operating costs of the first year were calculated, the cost for DI was $74,000.00. The cost of a RO system would have been less than $15,000.00, and for their water quality needs (Type III), they did not even need DI as the RO system produced the water quality they needed. His boss was not impressed, and sadly, he lost his job.If you are just needing a gallon or two a day of deionized water, then maybe it's not worth it to have an RO system (although a small RO system might cost only a couple hundred dollars. But if you are using 10, 20, 50 or even 100 gallons of water a day, then it is imperative that reverse osmosis be the primary demineralization method before DI. That is the most cost effective method. What a high purity Type III water treatment system might look like for an application that might need 300 gallons a day (as an example): Step 1: Granular Activated Carbon Filter - Removes chlorine and chlorine and chloramine which is detrimental to RO Membranes. Step 2: Anti-Scalant System - Prevents scale from forming on the membrane,s increasing system efficiency and longevity. Step 3: Reverse Osmosis System - This is the primary demineralization method which removes up to 99% of the total dissolved solids (TDS), so that the DI components only have to polish the water off and remove that 1%. Step 4: Deionization System- US Water Systems has a number of DI configurations, but this is one of our most popular. Also, if you need water that is Type I or Type II, we also have systems that deliver that, like THESE. Most RO - DI systems are custom engineered for our customers particular applications. If you are unsure of what type of DI or High Purity you need, please feel free to talk to one of our Certified Water Specialists or Commercial Engineers. We have over 200 years of combined experience and likely have a solution for you that is proven effective and economical.