REVERSE OSMOSIS MEMBRANES AND MEMBRANE ELEMENTS
PURPOSE OF REVERSE OSMOSIS MEMBRANES
Reverse osmosis membranes are used as the main filtering replacement element in water filters, which are based on reverse osmosis . This purification method is the most advanced, environmental and economically promising for water purification from all kinds of contaminants.
The first membrane element was developed in parallel by scientists from several countries more than 30 years ago. The starting point for the start of research was the accumulated knowledge about the cell of a living organism, which can let in nutrients, but delay the passage of harmful substances at the same time. This phenomenon is called osmosis. Then the scientists decided to come up with a material that can, under pressure, separate contaminated water into clean (permeate) and dirty (concentrate) water. The technology of reverse osmosis water treatment is being improved every year – there are new super-selective and productive membrane elements to reverse osmosis resistant to chemical attack and other contaminants.
Any reverse osmosis membrane , regardless of purpose, manufacturer and performance, has 2 main elements:
Membrane sheet through which water molecules are pressed under pressure.
A permeate tube for draining purified water into which purified water enters through perforated holes.
REVERSE OSMOSIS MEMBRANE CLASSIFICATION
There are several ways to classify reverse osmosis membranes:
- By appointment. Reverse osmosis membranes are divided into commercial and domestic. Commercial ones are used in enterprises known as industrial Ro plant to produce excess pure water, and domestic ones are used in home reverse osmosis filters .
- By working pressure. There are high pressure membranes and low pressure membranes.
- By landing size: 1812 , 2012 , 2812 , 3012 , 3020 , 2521 , 2540 , 4021 , 4040 , 8040 , where the first 2 digits determine the diameter of the membrane, multiplied by 10, and the second 2 digits – the length of the membrane. Both values are expressed in inches.
- By salinity of water. Reverse osmosis membranes for sea water and for fresh water.
- By performance. This classification is used mainly for household reverse osmosis membranes, since with the same geometric size, membranes can have different capacities – 36 GPD , 50 GPD , 75 GPD , 100 GPD , 125 GPD .
HOW TO CHOOSE AND BUY A REVERSE OSMOSIS MEMBRANE?
A variety of produced reverse osmosis membranes allows their use in various methods of water treatment. Membranes having a selectivity of more than 99% are used to completely demineralize water. With their help, it is possible to reduce the salinity of the purified water by more than 100 times.
In low pressure membranes, selectivity is less, and the outlet water contains more trace elements. Such membranes are used to produce high-quality drinking water in the food industry and in industry it is known as industrial Ro plant. Dow Chemical from the United States produces reverse osmosis membranes that are suitable for most domestic and international reverse osmosis water treatment systems. The reverse osmosis membrane allows you to get up to 15 liters of purified water per hour at an operating pressure of up to 6 atmospheres. The service life of the reverse osmosis membrane Filmtec 1812-50 is calculated up to 3 years or 8000 liters per family of three people living in a city apartment. Membrane with a capacity of up to 135 l / day has a filtration efficiency of more than 98%. The quality control of reverse osmosis membrane elements is carried out visually and using vacuum control, and performance and selectivity are also checked. This ensures exact compliance with the specifications of all manufactured reverse osmosis elements of . When processing reverse osmosis elements , chlorine and other oxidizing agents are not used. This affects the increase in the duration and stability of the membrane elements of reverse osmosis and increase their reliability. The membranes have increased resistance to biocontamination and can operate at lower operating pressures.
For further information click here : Ro plant price in Pakistan
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