Reverse osmosis is motion of permeation from an opposite direct,which is a method under the driving force of the pressure to separate solute from solvent by the semi-Permeable membrane.It is now popularly applied for pruifcation and concentration of all kinds of liquid,and one of the most popular is the application in water treatment..Abio-ion,germ,virus,organi matter,colloid and etc can be wiped off by use of Reverse osmosis techniques to obtain water with high purity.

Reverse osmosis membrane is a compound membrane made of liquid core columns ,separating net,membrane,screen and shell,the filter diameter is only 0.0001micron,working prissure is 0.6-1.5Mpa,salt taking -off rate is up to 99%,chemical ion,germ and virus can not pass and discharge with waste water ,only water molecule and wxygen molecule with a volume less than 0.0001micron can pass in order to get purified.

The principle of reverse osmosis:
Reverse osmosis, also known as reverse osmosis (RO), is a certain pressure so that the solvent solution by reverse osmosis membrane separation. Because it is the opposite direction and natural infiltration, so called reverse osmosis. According to a variety of different materials, osmotic pressure, you can make up greater than the osmotic pressure of reverse osmosis separation, extraction, purification and concentration of purpose.
RO advantages:
* Continuous operation, product water quality and stability
* No need to use acid regeneration
* Regeneration and downtime will not be
* Save the recoil and cleaning water
* To produce ultra-pure water in high yield (yield up to 95%)
* No recycled sewage, sewage treatment facilities do not have to
* No need to dilute the acid and acid-base transport facilities reserve
* Reduce the plant construction area
* Use safe and reliable, to prevent workers from exposure to acid-base
* To reduce operating and maintenance costs
* Easy to install, low installation costs
Reverse Osmosis Equipment Applications:
* Drinking water: pure water, mineral water, spring water, bottled water bucket
* Food processing water: cold food, canned food, poultry, processed meat category, finishing and other vegetables
* Water for alcoholic drinks: wine, beer, wine, carbonated beverages, tea beverages, dairy products, etc.
* Ultra-pure electronics industry: silicon semiconductors, chips, and liquid crystal displays
* Water for the pharmaceutical industry: pharmaceutical preparations, infusion, extraction of natural substances, drinks, medicine
* High-quality drinking water: residential, hotels, airports, schools, hospitals, military units, enterprises and institutions
* Industrial process water: cars, ultra-pure water electroplating, painting, coating, paint, boilers, water softening, etc.
* Seawater brackish water desalination: islands, ships, saline areas drinking water system to take
* Textile and paper water: dyeing water, water-jet loom water, White Water, etc.
* Fine Chemicals Water: cosmetics, detergents, bio-engineering, genetic engineering, etc.
* Cooling water: central air-conditioning, refining, water-cooled air-conditioning
* Swimming pool water: the indoor swimming pool, outdoor pool and other landscape
* Flowers and aquaculture water: flower seedlings, tissue culture; fish farming, ornamental fish

Active carbon are mainly use for the reverse osmosis pretreatment system , it can absorb the residual chlorine and microorganism and make the water suitable for RO membrane inlet water condition .