The best desalination technology can undoubtedly consider methods such as membrane method and osmosis, and the treatment effect is better, but at the same time, the construction cost and operation cost are too high, and the treatment cost will cause great economic burden to enterprises. The problems of membrane pollution and membrane cleaning are also complicated, which are not really practical for enterprises, so it is not necessary to consider them. So it is treated by biochemical process.

Of course, there must be a series of problems in treating high-salinity wastewater by biological methods, such as high salt concentration will greatly inhibit the growth of microorganisms. It is mainly due to the dehydration of microbial cells caused by high osmotic pressure when the salt concentration is too high, and the dehydrogenase activity is reduced due to salting-out in the case of high salt content, and the high chloride ion concentration is also toxic to bacteria. These are the difficulties in biological treatment of high-salt wastewater, but the salt content of high-salt wastewater can be reduced through pretreatment, and then the biodegradability of wastewater can be improved through some processes, and at the same time, strains adapted to high salt concentration can be obtained through cultivation and domestication to treat wastewater.