reverse osmosis

Understanding Reverse Osmosis

Perhaps, you are interested in buying an RO water filter, but you don’t know what exactly that means. I get it, Reverse Osmosis sounds like a term from science class that you just nod along with pretending to understand. But, before we go to the nitty-gritty details of Reverse Osmosis, let’s briefly discuss what Osmosis is:

Osmosis, in layman’s term, is a process where a less salty solution will migrate to a saltier solution. Now, imagine that there is a semi-permeable membrane or some sort of screen between the solutions. When the less salty solution moves toward the more saline solution, this membrane will serve as a filter allowing other molecules to pass while blocking the others—like a strainer!

Have you gotten the picture yet? Good. Let’s move to discuss Reverse Osmosis.

Reverse Osmosis (RO) is, well, Osmosis in reversed: the saltier solution is pushed towards the less saline solution. So, technically speaking, Reverse Osmosis uses energy to force saltwater through the semi-permeable membrane towards the freshwater. Reverse Osmosis works by using a high-pressure pump to increase the pressure on the salt side of the RO and force the water across the semi-permeable RO membrane, leaving up to 99% of dissolved salts or ions, particles, colloids, organics, and bacteria in the reject stream.

It is also important to note that Reverse Osmosis System does not use regular filtration process where the contaminants are removed from the filter media. Instead, it uses cross-filtration process wherein there are two outlets:

The contaminated water goes one way and the filtered water goes the other. This process sweeps away contaminant build-up and allows enough turbulence to keep the membrane surface clean.

Reverse Osmosis is very effective for salt, surface, and groundwater. It works in both small and large water flow applications. If you are interested in Reverse Osmosis water filter, you can check out this list of quality water filters from Megafresh.

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