Before You Purchase an Industrial RO System: Pre-Treatment
Chlorine, also known as sodium hypochlorite and commonly known as bleach can be used in many different applications. Since the early 1900s, chlorine has been commonly used to disinfect municipal water supplies. Concerns over disease-causing microbes (pathogens), such as typhoid, dysentery, and cholera prompted the use of water treatment equipment and chemicals to help with disinfection. However, this can cause problems for your industrial RO system. Most RO Membranes in today’s market are Polyamide (PA) / Thin Film Composite (TFC) and do not have a high tolerance to chlorine. While most membrane manufacturers limit the amount of Free Chlorine that membranes can tolerate chlorine before degradation begins, there are some membranes in the marketplace that can tolerate chlorine. For the majority of RO applications, Chlorine removal will need to take place.
There are a few options for free chlorine removal. One common way to remove chlorine from the feed water source is using carbon filtration prior to the reverse osmosis system. Sodium Metabisulfite is a chemical that is used in the process to remove total and free chlorine from the water source. You can read more about these processes in our full ebook.
A UV system is not a common way to break down chlorine but we at Complete Water Solutions have used it as such. Using UV over carbon or chemical offers benefits, like no backwashing Waste Water, and also offers disinfection. UV systems have to be sized properly 10-30 times the normal disinfection rate. There are some additional factors to take into consideration, such as inlet water quality, and you may need additional treatment before the UV System or you may experience higher operating costs. We can help you with that.
Hardness: Calcium, Magnesium, & Iron
Finally, Calcium & Magnesium is commonly known in the water industry as “Water Hardness”. Hardness is the measurement of calcium and magnesium minerals in the water source. Water hardness will directly impact
the performance of your RO System, not to mention if not treated it can lead to irreversible damage. There are many ways to handle hardness. Two of the most common options are water softening and chemical treatment. The last of the filtration steps to discuss is iron removal. Iron can be removed in a variety of ways from oxidation and precipitation, to ion exchange. The experts at Complete Water Solutions can help you find the best process to remove hardness and iron from your water.
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