Which technologies are better for treating high-salt wastewater?

At present, the treatment methods of high-salinity wastewater mainly include physical method, chemical method, biological method and physicochemical method. These methods have their own advantages and disadvantages. The traditional evaporation method is widely used, but because it consumes a lot of energy. Therefore, with the implementation of energy saving and emission reduction programs and policies, these enterprises need to transform. As early as 196s, Germany and France have successfully applied this technology to chemical industry, food, paper making, medicine, seawater desalination and sewage treatment. The working process of evaporator is to compress the steam at low temperature by compressor, so that the temperature and pressure increase and the enthalpy increase, and then enter the heat exchanger for condensation, so as to make full use of the latent heat of steam. There is no need to generate steam in the whole evaporation process except for start-up. China has introduced this technology and successfully applied it to evaporation concentration and wastewater treatment in chemical industry.