Reverse Osmosis System: Function and Process

Have you ever wondered where your drinking water comes from and why it is potable? You probably have an idea about the water filtration process your local supplier uses but don’t know exactly how it works. One of the most efficient water treatment solutions commercially used today is reverse osmosis (RO). Here’s a look at the process:


A reverse osmosis system consists of a number of components. Its major components include the cold water line, automatic shutoff, check valves, pre-filters, semipermeable membranes and flow restrictor. The semipermeable membranes are the heart and the largest component of the system. It’s supported by the pre-filters, which eliminate dirt and debris present in the water before being fed fully into the membranes.


The cold water line valve allows water to flow into the RO system. Before water reaches the semipermeable membranes, it passes through the pre-filters, where particles larger than the semipermeable membranes, such as silt and sediment, are trapped. Afterward, the pre-filtered water enters the semipermeable membranes using a predetermined pressure. The filtered water goes out through the built-in faucet for immediate use.


RO systems come in different sizes and capacities. Before purchasing one for commercial applications, it is crucial to first determine the filtration rate required and the total dissolved solids in the water (TDS). There are specific RO systems designed for larger filtrations rates.


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