Reverse osmosis (RO) is a technique for removing dissolved solids and pollutants from water by passing water through a semi-permeable RO membrane that enables water to flow through but leaves the bulk of dissolved particles and some other contaminants behind. In order for RO membranes to function, water must be under high pressure. The “permeate” refers to the water that goes through the RO membrane, while the “concentration” refers to the soluble substances that are refused by the RO membrane. A correctly functioning RO system may remove up to 99.5 percent of dissolved salts and contaminants from the water. Reverse osmosis can remove 99 percent or more of dissolved salts (ions), particles, colloids, organics, microorganisms, and pyrogens from the feed solution. Contaminants are rejected by a RO membrane based on size and charge.

LARCO India provides commercial reverse osmosis (RO) water treatment systems that transform high TDS water into low TDS water. Most of the time, water from bore wells and other sources includes a high level of dissolved salt, making it unsuitable for drinking and a variety of other uses. We supply Ro plants ranging from 50 LPH to 50 m3/hr.

How does Reverse Osmosis work?

Reverse osmosis works by increasing the pressure on the saline side of the RO and forcing the water past the moderately RO membrane, releasing practically all of the dissolved salts in the reject stream (about 90 percent to 99 percent). The water molecules pass through the semi-permeable membrane as the feed water enters the RO membrane under pressure (enough pressure to overcome osmotic pressure), but the sulphates and other contaminants are not allowed to cross and are discharged through the reject stream (also known as the concentrate or brine stream), which can be drained or fed back into the feed water supply in some conditions to be recycled through the RO system to save water.

It’s crucial to realize that a RO system uses crossover filtration rather than traditional filtration, which collects pollutants inside the filter material. The solution flows through or crosses the filter with two exits in cross filtration: the purified water will flow one way and the water contamination goes the other. Crossflow filtration removes pollutants by allowing water to whisk them away while also providing enough volatility to keep the surface layer clean.

Features of RO system

  • Removal of dissolved salts
  • Energy saving separation technique
  • Utilizable as a concentration and recovery method
  • Compact equipment
  • Simple operation and control
  • Useful for superior quality water usage

Applications of RO system

  • Drinking water supply schemes for Local bodies
  • Food processing & milk industries
  • Sugar Factories
  • Other industries where water is used in mfg process
  • Domestic RO for household use
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