About Reverse Osmosis

Reverse Osmosis was developed as a water treatment method more than 40 years ago. The process first arose as a technique of desalinating seawater. Once the method’s decontaminating capabilities were recognized, reverse osmosis systems began to be commercially produced for home water purification purposes. Such systems were installed in homes as early as the 1970s. Reverse osmosis systems seemed a viable option to the more costly and energy-wasteful distillation units. The application of reverse osmosis to the solution of problems in water treatment requires an understanding of the basic mechanisms involved in the process, the limitations of reverse osmosis and the pre-treatment requirements.

The The Process

The reverse osmosis process depends upon a semi-permeable membrane through which pressurized water is forced. Reverse osmosis, simply stated, is the opposite of the natural osmosis process of water. Osmosis is the name for the tendency of water to migrate from a weaker saline solution to a stronger saline solution, gradually equalizing the saline composition of each solution when a semi-permeable membrane separates the two solutions. In reverse osmosis, water is forced to move from a stronger saline solution to a weaker solution, again through a semi-permeable membrane. Because molecules of salt are physically larger than water molecules, the membrane blocks the passage of salt particles. The end result is desalinated water on one side of the membrane and a highly concentrated, saline solution of water on the other side. In addition to salt particles, this process will remove a select number of drinking water contaminants, depending upon the physical size of the contaminants. For this reason, reverse osmosis has been touted as an effective drinking water purification method.

Producing Drinking Water Using Reverse Osmosis

Best RO Water Purifier is most popular technology now a days in Bangladesh. Although Reverse Osmosis seems like a complex system it is really a simple and straightforward water filtration process. And it's not a new process. High-pressure (pump driven) reverse osmosis systems have been used for years to desalinate* water – to convert brackish or seawater to drinking water. Having a better understanding of how a reverse osmosis system works will eliminate the mystery and confusion you may feel when you look at a reverse osmosis system -- with its many colored tubes and multitude of filters. Read on to enhance your knowledge of residential reverse osmosis systems.

The most important points to remember:

• All RO Systems work the same way.
• Most RO (Reverse Osmosis) systems look alike.
• All RO Systems have the same basic components.
• The real difference is the quality of the filters and membranes inside the RO.

How does a Reverse Osmosis Membrane work?

Reverse Osmosis is a process in which dissolved inorganic solids (such as salts) are removed from a solution (such as water). This is accomplished by household water pressure pushing the tap water through a semi permeable membrane. The membrane (which is about as thick as cellophane) allows only the water to pass through, not the impurities or contaminates. These impurities and contaminates are flushed down the drain.

For a definition of **Reverse Osmosis.
Ultimately, the factors that affect the performance of a Reverse Osmosis System are:

• Incoming water pressure
• Water Temperature
• Type and number of total dissolved solids (TDS) in the tap water
• The quality of the filters and membranes used in the RO System 

Advantages of Reverse Osmosis

RO system is most reliable technology in Water Purification Technology. By RO System it is possible to get 100% safe drinkable water, The RO System not only use in home and drinking purpose, The RO System is widely using in different industry. The advantage of Reverse Osmosis ( RO can be as follows:

• Improves taste, odor and appearance.
• Highly effective purification process. Will remove the pollutants listed below and more!
• Consumes no energy
• Very convenient
• Flushes away pollutants, does not collect them
• Easy to keep clean
• Low production cost - gives you water of a guaranteed quality for pennies per gallon

Are all Reverse osmosis systems and filters the same?

Are you think all RO Water Purifier are same quality ??? While one RO System may look just like the next in terms of design and components, the quality of those components can be very different. These differences can have a significant impact on the quality of the water the system produces.

Here are some examples of questions you might ask and consequences associated with "less than desirable" quality

• Has the manufacturer used sound methods?   What types of welds have been used in these plastic products? Will they allow contaminated water to bypass the filtration system? Will they allow the system to leak?

• How has this filter or membrane been created?   Will it allow the water to 'channel' and, in effect, bypass the removal component of this device?

• What about the quality of the 'fill'?   Are its contents of a high enough quality to produce the expected percentage of contaminant reduction? Carbon quality, for instance, can have huge variances in reduction capability, reduction capacity, and the sloughing of 'fines', which can prematurely clog or foul the RO Membrane.

• What are the manufacturer's controls on tolerances or variations in specifications?      If this component is rated as a 1-micron filter will it truly filter out everything larger than 1 micron or will it only do the job 80% of the time? And, what if it actually filters at a .5-micron rate? That will stop the system from flowing -- clogging it and forcing filter replacement? If this is a sediment filter and it fails the excess sediment will clog or foul the RO Membrane.
• And in general -   Are the materials used in this product FDA or NSF (National Safety Foundation) approved? If not, you might question their quality or performance ability. So, it becomes clear that the quality of the components is the key to an optimal functioning RO System.

So, it becomes clear that the quality of the components is the key to an optimal functioning RO System.