Ters Osmoz (Reverse Osmoz) bir membran teknolojisi olup, osmotik basınç kullanılarak, mineralce zengin olan suyun, yarı geçirgen bir membranın diğer tarafına mineralleri azaltılmış olarak geçirilmesi işlemidir. Suyun içerisinde bulunan birçok mineral, bakteri ve virüsler %99 saflığa kadar bu yöntem ile süzülebilmektedir.
Among the main uses of reverse osmosis; steam boilers, feed water preparation, coating, pharmacy, food and beverage industry, drinking water production.
It is relatively simple compared to reverse osmosis-like technologies and is a membrane technology. Normal osmosis occurs in nature by the passage of water from one to the other of two liquids of different concentration, between which there is a semi-permeable membrane that only allows water to pass through and is impermeable to other substances. This process continues until both parties are balanced. Osmotic pressure occurs with the difference in static height, which occurs when there is a volume change in the liquids on both sides of the membrane.
In reverse osmosis, by applying a pressure by the liquid with higher concentration, the minerals, salts and organic substances in the liquid with the higher density are left on one side of the membrane and passed to the other side as a liquid with a lower density, free from salts and minerals. In practice, only a certain percentage of the pumped water is allowed to pass through this membrane. The concentration with a much higher concentration of minerals, salts and organic substances is given to the drain. In order to prevent problems such as polarized molecules, known as Concentration Polarization, accumulating on the membrane in a short period of time and not allowing more flow, the membranes must have an arrangement that can be washed under pressure periodically.