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The RO System originated in the United States and was originally designed to provide manned space shuttles with purification equipment for recycling human wastewater. The application of this technology in the US spacecraft has been satisfactorily successful.
Since then, the American Atomic Energy Research Center and the water purification industry have invested a large amount of manpower and funds in other applications of this water purification technology and conducted extensive research. In the 1990s, reverse osmosis technology was widely used in seawater desalination, power plant boiler hydration, high-purity water for electronic industry production, high-purity water for scientific research, high-purity water for medical use, and drinking water.
Reverse Osmosis (RO) is a high-tech membrane separation technology based on pressure difference. It has the characteristics of high resolution, no phase change, simple and high efficiency. The "pore diameter" of the reverse osmosis membrane has been as small as nanometers (1 nm = 10-9 m), and no "filtered" pores on the surface can be seen under scanning electron microscopy. Under the operating pressure higher than the osmotic pressure of the raw water, the water molecules can reverse osmosis through the RO semi-permeable membrane to produce pure water, and a large amount of inorganic ions, organic matter, colloids, microorganisms, pyrogens and the like in the raw water are retained by the RO membrane.
The RO System usually consists of a raw water pretreatment system, a reverse osmosis purification system, and an ultra-purification post-treatment system. The purpose of the pretreatment is to make the raw water reach the water inflow requirement of the reverse osmosis membrane separation module and ensure the stable operation of the reverse osmosis purification system.
The reverse osmosis membrane system is the most economical and efficient purification method for removing 98% or more of ions, organic matter and 100% microorganisms in the raw water at one time. The ultra-purification post-treatment system further removes trace ions, organic substances and other impurities remaining in the reverse osmosis pure water through various integration techniques to meet the final water quality index requirements of different uses.
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