The Origin of Reverse Osmosis (RO) Pure Water Equipment

Reverse osmosis water treatment equipment is widely used in electronics, the chemical industry, medicine, food and beverage, textile printing, and dyeing. Ultrafiltration is a dynamic process that does not clog membranes easily, operates at room temperature, and requires low pressure. Its simple equipment structure makes it easy to operate.

Technical parameters

Output water flow: 4-50T/h 

Filtration accuracy (in terms of cutting molecular weight): 6000 10000 30000 50000 100000 

Use pressure: 0.1-0.3 MPa 

Operating temperature: 5-45

Compact Industrial Reverse Osmosis RO Equipment

1. What is Reverse Osmosis?


In the 1960s, reverse osmosis (RO) was created as a new membrane separation method. It utilizes a reverse osmosis membrane to separate the solvent from the solute in a pressurized solution.

In general, water flows from a low concentration to a high concentration. Following the reverse osmosis principle, once the water is subjected to pressure, it will flow from high to low concentration. Since the pore size of the RO membrane is five millionths of a hair (0.0001 microns), which is generally imperceptible to the human eye, bacteria, and viruses are 5000 times more difficult to pass through.

Therefore, only water molecules and some beneficial mineral ions can pass through, while other pollutants and heavy metals are removed from the wastewater pipe. This technology is utilized in all desalination operations and recycling astronaut wastewater. The RO membrane is also known as a high-tech in vitro artificial kidney.

Reverse Osmosis Membrane

2. The Principle of Reverse Osmosis

First and foremost, we must comprehend the concept of “osmosis.” Osmosis is a purely physical process. When two types of water with different salt concentrations are separated by a semipermeable film, the lower salt concentration water will pass through. The contained salt does not permeate the membrane.

In this manner, gradually combine the salt concentrations on both sides until they are equivalent. However, this process takes a long time to complete. If pressure is applied to the waterside with a high salt concentration, the previously mentioned permeation can also be halted. This pressure is known as the osmotic pressure.

Therefore, the principle of reverse osmosis desalination is to apply a pressure greater than the natural osmotic pressure in salty water (such as raw water) so that osmosis proceeds in the opposite direction and the water molecules in the raw water are pressed to the other side of the membrane. To achieve the purpose of removing impurities and salt from the water, water must be purified.   

Reverse Osmosis Systems work flow

3. The Origin of RO reverse osmosis

In 1950, American scientist DR.S.Sourirajan discovered by accident that seagulls sip a large mouthful of seawater from the surface of the water while flying on the water, and then spit out a small mouthful of seawater a few seconds later, which cast doubt on the theory that seagulls drink seawater from the surface of the water.

Because animals that breathe on land through their lungs cannot drink the salty ocean. After dissection, it was discovered that the body of the seagull contains a thin, delicate layer. The seagull inhales seawater and then presses it, causing water molecules to pass through a membrane and transform it into fresh water, while the seawater containing contaminants and highly concentrated salt is spat from the mouth.

This is the fundamental theoretical underpinning of the later reverse osmosis technology, and the University of Florida applied it to seawater desalination and desalination equipment in 1953. In 1960, Dr. S. Sidney Lode, a professor at the U.C.L.A. University School of Medicine, with the U.S. federal government’s support, collaborated with Dr. S. Soirirajan to begin research on reverse osmosis membranes and invested approximately 400 million U.S. dollars annually in research used by astronauts.

Utilize, so that the spacecraft does not need to transport a big quantity of potable water into space. Until 1960, an increasing number of researchers and specialists devoted themselves to research, which improved its quality and quantity, thereby resolving the difficulties of humans in the water.


Scroll to Top