How to treat wastewater with high salt content? How to treat high-salt wastewater? Can sodium chloride and sodium sulfate be separated? How to obtain high purity salt?

The treatment of high-salt wastewater, in order to obtain crystalline salt, has to go through three stages: 1, separating univalent salt and bivalent salt with nanofiltration membrane; 2. Concentrate high brine with DTRO membrane; 3. Concentrate and crystallize the high-concentration brine in the evaporation crystallizer to obtain high-purity sodium chloride and sodium sulfate.

In the first stage, if the total salt content of wastewater is less than 654.38+500,000, COD

The second stage is the key stage of brine concentration. The concentration efficiency of wastewater at this stage is directly related to the amount of water entering evaporation crystallization, thus affecting the operating cost. Zheng Jin DTRO membrane can concentrate the highest salt content of sodium chloride solution to 65438 0.45g/L and sodium sulfate solution to 2065438 0g/L.. The performance has been verified by many cases and the running effect is very stable.

In the third stage, evaporation crystallization or freezing crystallization is carried out according to the physical and chemical properties of the two salts.