What methods can be used to fully recover the concentrated water generated after two-stage membrane treatment of industrial wastewater?
Thread Content
What methods can be used to fully recover or recover most of the concentrated water generated after two-stage membrane treatment of industrial wastewater? The concentrated water is characterized by a high salt content; its quality varies depending on the quality of the water fed into it for treatment. The pH value is within the acceptable range, and the SS level is low.
It can be directly used as make-up water for circulating water. That's how we do it.
The salt content is just too high; for the concentrated water obtained after two stages of membrane filtration, the recovery rate via electrodialysis is likely to be low, right?
Using chemical control prevents scaling and corrosion, and there is no need for wastewater discharge.
Isn’t this exactly the zero-emission process required for the environmental impact assessment of coal chemical industries?
Concentrated salt extraction can achieve zero emissions
So, are high-concentration brine solutions used as make-up water for circulating water? Did you get it wrong?
The evaporation + crystallization process is generally used.
We have carried out many projects using this method to treat high-salt wastewater; the highest chloride concentration reached 30,000 mg/l, and no corrosion or scaling occurred in the system even after one year of operation.