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Mar 9, 2019·4 min read
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How Are Chemicals Good For Your Industrial RO System?

How Are Chemicals Good For Your Industrial RO System?

Quick Answer: Industrial RO systems need specific chemicals. Antiscalants stop carbonate and sulfate scale from building up on membranes. Sodium bisulfite or activated carbon get rid of chlorine, which can damage polyamide membranes. Citric acid and caustic cleaning agents clean away foulants during CIP cycles. Biocides control biofilm between cleanings. Picking the right chemicals based on your feed water chemistry is super important for how long your membranes last.

\\n\\nIf you own an Industrial RO, you probably have a pretreatment system to soften your water before it goes through the main process. You’re also likely using chemicals to keep your machinery running longer and more efficiently. But are these chemicals truly good for your equipment?\\n\\nTesting chemicals for compatibility with your Industrial RO system beforehand is something people often forget when they’re setting up a treatment plant. It’s true that reverse osmosis removes almost every contaminant, but the process doesn’t play nice with every chemical out there. Even though the RO system can remove them, these chemicals can still harm it if you don’t check them, leading to a huge drop in efficiency. Here are some chemicals you should pretest for your water:\\n

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  1. Anti-scalants: \\nThese chemicals protect your RO system from scaling and damage. You need to test them for two main things. First, microbiological growth. If you store antiscalants for too long, they can grow certain bacteria. These bacteria can then get into your water system, whether it’s for your home, factory, or institution, making your dilution tank unusable. You also need to test the chemical for compatibility with your membranes. Not every antiscalant is membrane-friendly. They’re supposed to remove scale from the surface, but if they’re incompatible, they can actually erode the membrane.
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  3. Cleaning chemicals: \\nWe add chemicals to the system during pre-filtration to avoid problems in your industrial RO caused by impurities. But each chemical reacts differently with other chemicals and with the system itself. That’s why pre-testing is crucial before you use any chemical in your system. There are generally two types of tests that help figure out how a chemical will affect the system: the soak test procedure and the cleaning test procedure. When you compare the results, you ideally want to see only a 5 percent flux loss and absolutely no increase in salt passage compared to your baseline numbers.
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  5. Biocides: \\nThese are a really important step in water pretreatment. Biocides wipe out almost every water-borne disease. However, if you use too much, they can make the membrane lose its permeability or salt rejection. But that doesn’t mean we should stop using these chemicals that protect us from diseases. The trick is to use them smartly in your RO system. You should do a continuous operation test extensively before using them daily. A biocide gets a green light if there’s no change in salt passage and normal permeable flow after 1,000 hours of testing.
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\\nAntiscalants, biocides, and cleaning chemicals are the most common chemicals for pretreating water. The testing parameters and procedures are pretty straightforward. They should maintain a regular, normalized membrane flow and salt passage without affecting your RO system’s performance. These procedures are vital for treatment plants that supply water to thousands of families every day.\\n\\nAuthor’s Bio:\\nAMPAC USA builds advanced reverse osmosis water treatment systems. For over 28 years, we’ve given customers worldwide solutions to their water treatment problems. With a long, impressive track record, AMPAC USA works hard to create solutions that make RO systems better, improving quality and cutting costs.\n

Related reading: Know Your Industrial Machines! – Industrial RO Systems, A decision analysis framework for estimating the potential hazards for drinking water resources of chemicals used in hydraulic fracturing fluids, Determining the presence of chemicals with suspected endocrine activity in drinking water from the Madrid region (Spain) and assessment of their estrogenic, androgenic and thyroidal activities.

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