Abstract: The reverse osmosis water treatment technology is the most advanced, energysaving and environment protecting separation technology today. The principle is that under the pressure higher than the solution infiltrating pressure, the semipermeable membrane will allow the water to pass and prevent other materials to pass, and by using this selection feature of semipermeable membrane, the solute and solvent can be separated. Utilizing the filtering features of semipermeable membrane, the dissolved salt, colloid, organic matter, germ and some other impurity can be efficiently removed from water. This technology has advantages of lower energy consumption, pollution free, advantageous technology, simple for operation and maintenance and so on. The economical efficiency of the reverse osmosis water treatment technology applied in boiler make up water treatment system of Huadian Fularji General Power Plant of China Huadian Corporation and that of the traditional ion exchange desalination water treatment system were compared, the principle and application advantage of the reverse osmosis water treatment technology were expounded.

Key words: water treatment technology, reverse osmosis, semipermeable membrane, ion exchange desalination, industrial wastewater