Reverse Osmosis Antiscalant
Reverse osmosis antiscalant is a blended water treatment agent mainly composed of organic phosphonates or polycarboxylic acid copolymers. It is miscible with water in any proportion, and insoluble in most oily organic solvents. It can inhibit the crystallization and deposition of calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate and silica scale on the RO membrane surface through chelation, lattice distortion and dispersion effects. It remains stable within the general pH range of RO feed water. It is not corrosive to reverse osmosis membranes under recommended dosage. Strong oxidants such as chlorine can decompose its active components and reduce its scale inhibition efficiency, so it cannot be used together with oxidizing biocides simultaneously. It is non-flammable and non-explosive. Long-term exposure to strong alkali at high temperature will degrade the functional groups and weaken its performance. It has low volatility under normal storage.
Applicaion of Reverse Osmosis Antiscalant
Reverse osmosis antiscalant is specially developed for reverse osmosis membrane systems. It is widely used to prevent the formation and adhesion of inorganic scale on the surface of RO membranes. It can effectively control scaling of calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate and silicon dioxide, and keep the membrane surface clean. It helps maintain stable water flux, reduce the frequency of membrane cleaning, extend the service life of reverse osmosis membranes and cut down the operation cost of water treatment systems. It is applicable to various raw water sources including underground water, surface water, circulating water and brackish water. It is suitable for RO systems in many industries such as power plants, chemical factories, electronic manufacturing, food & beverage, pharmaceutical industry, seawater desalination and municipal water reuse. It is added continuously by dosing pump before the RO membrane module. Compared with acid dosing scale inhibition method, it features lower dosage, easier operation and less impact on the pH of produced water. It can be matched with non-oxidizing biocides to control both scaling and microbial pollution.
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