Since its establishment in the 1950s, electrodialysis technology has risen rapidly in the application of engineering technology. It has played an increasing role in industries such as seawater desalination, brackish water desalination, seawater concentration salt production, wastewater treatment, and food, medicine, electronics, and power industries . With many excellent application examples, it has confirmed its technological advancement and several excellent characteristics that other separation methods cannot replace. Several magical functions that are being developed and will be developed are even more colorful. China is the research and development work of electrodialysis project since 1958, and it belongs to one of the countries that started earlier in the world.
Reverse osmosis technology is a new technology applied in the world in the late 1960s. Reverse osmosis (RO), also known as reverse osmosis, is mainly composed of a high-pressure pump and a reverse osmosis membrane. In the case of high enough pressure, except for water molecules, other minerals in the water, organic and various ions are almost rejected outside the membrane, and washed out by high pressure water flow. The water that penetrates the other side is safe, hygienic and pure water. The principle is equivalent to a semi-permeable membrane in the human body, so that useful substances can be used through the membrane, and unnecessary substances are discharged. Because it is in the opposite direction of natural penetration. It is called reverse osmosis. It has become an important technical equipment in modern pure water, high-purity water preparation, seawater desalination, brackish water desalination and other industrial separation projects.