What method does industrial sewage treatment equipment rely on to effectively remove salt?

High salt content in wastewater from industrial wastewater treatment plants has become a common phenomenon with a wide range of production channels (chemical plants as well as oil and gas collection and processing). If not treated and discharged, surface water will be polluted, resulting in water shortage. Industrial wastewater desalination, seawater desalination and wastewater reuse are all important water resource utilization technologies. What kind of sewage treatment technology do we need to meet the discharge standard of high-salt wastewater, and at the same time, the recycling and zero discharge of wastewater can meet the requirements of energy saving and emission reduction?

At present, it is more effective to use biological treatment in industrial wastewater engineering to treat high-salt wastewater. The wastewater should be complex in composition and low in recovery value, and the cost of using other processes is high. Biological treatment microorganisms will undergo a period of acclimation and adaptation from low salt to high salt to tolerate a certain salt concentration. The selection of biological treatment process and parameters should be considered according to the characteristics of saline wastewater, and attention should be paid to controlling the unfavorable factors of saline wastewater treatment. The process flow of industrial sewage treatment equipment mainly includes adjustment tank, aeration tank, secondary sedimentation tank, sludge return, excess sludge dewatering, and nutrient addition. The main focus here is the sudden change of salt concentration, which has a great impact on microorganisms. It is necessary to strengthen the monitoring and control of salt concentration changes. Emission standards can be met.

According to the different osmotic pressures of various materials, reverse osmosis membrane technology achieves separation, extraction, purification and concentration through RO membrane technology to achieve the purpose of deep desalination. By maintaining a reasonable feed water temperature, the performance of the membrane will be greatly improved, and the reuse of salty wastewater can be realized. Under the optimal working conditions, the removal rates of COD and TDS by the one-stage two-stage membrane process can reach 90% and 99%, respectively. Commonly used in seawater desalination and reuse water treatment equipment. In the treatment of high-salt sewage, there are other treatment processes, such as traditional distillation desalination, electrodialysis technology, vapor compression condensation desalination technology, etc. Low treatment cost, good technology and safety, good investment source and management system and other practical conditions are the way to go in the future treatment of high-salinity wastewater. Thank you for watching our article on industrial sewage treatment equipment, and see you in the next issue