RO Antiscalant functions as a liquid antiscalant for treating the RO membrane system. RO Antiscalant efficiently controls Iron fouling by sequestration thereby reducing the frequency of membrane cleaning.
Now, why do we need RO Antiscalant? To understand the role of RO Antiscalant, first, we need to know about the Reverse Osmosis process and what leads to scaling.
Reverse Osmosis (RO) can be referred to as the process in which deionization and demineralization of water occurs by forcing it under pressure through a semi-permeable reverse osmosis membrane. Using of the reverse osmosis membrane for filtration of heavily soiled water is accompanied by some major issues that may bring down the productivity of the membrane. Generally, there are three major issues that needed to be dealt with namely – Degradation, Scaling, and Fouling of RO membranes.
Scaling takes place on RO membranes when the scale-forming substances concentration surpasses saturation, producing added solids within the RO feed water. Chemical substances that are included under scalants are calcium carbonate, strontium sulfate, calcium sulfate, barium sulfate, and reactive silica. These substances are found hard to be removed from RO membranes owing to their low soluble nature. Scaling abates the efficacy of the membranes in decreasing the solids concentration and causes more frequent cleanings. These issues tend to reduce the system productivity because they reduce wastewater purity.
To deal with these kinds of circumstances, the RO Membrane should be treated with Antiscalants prior to the initiation of the process of Reverse Osmosis. The range of RO Antiscalant includes Low pH, High pH, Neutral pH, High Silica RO Antiscalant, etc.
RO Antiscalant helps in controlling the inorganic scales of magnesium, barium, calcium, strontium, iron, fluoride and silica. RO Antiscalant serves as a very effective antiscalant for waters with LSI upto +2.7, Silica upto 175ppm (or mg/l), Iron upto 1.4ppm in reject, High SDI. Reverse Osmosis Antiscalant keeps capacity of RO close to design, and helps in minimizing membrane cleaning cost and shutdowns. It accounts for effective scale inhibition with high recovery rate. It is potent at low chemical dosage.