Under many water inlet conditions, the use of ion exchange resin or reverse osmosis is technically feasible, and the choice of process should be determined by economic comparison.
In general, the higher the salt content, the more economical the reverse osmosis. The lower the amount, the more economical the ion exchange. Due to the widespread popularity of reverse osmosis technology, the use of reverse osmosis + ion exchange process or multi-stage reverse osmosis or reverse osmosis + other deep desalination technology combination process has become a recognized technical and economic more reasonable water treatment program.
