Application of membrane separation technology in near zero discharge of electroplating wastewater

At present, facing increasingly serious environmental pollution problems, the electroplating industry, as one of the three major polluting industries in China, implementing clean production is an important measure for achieving sustainable development of electroplating enterprises under increasing environmental pressure. Therefore, membrane separation technology has been widely applied in the treatment of electroplating wastewater discharge and has achieved significant results.

The principle of membrane treatment system for reuse is membrane separation technology, and its core is RO (reverse osmosis) treatment unit. The treatment principle of this unit is to drive the water in the wastewater through the reverse osmosis membrane under pressure to become reusable water, while the impermeable salt and a small amount of organic matter remain in the concentrated solution. In order to reduce the processing pressure of the reverse osmosis unit, an ultrafiltration unit was added before the reverse osmosis treatment. Ultrafiltration can intercept particles and impurities of 0.002-0.1 microns, effectively blocking colloids, proteins, microorganisms, and large organic molecules. In order to prevent impurities in wastewater from contaminating membrane components and affecting the stable operation of the system and the service life of membrane components, effective pretreatment of the influent is necessary. Therefore, the processing system has added pre-treatment units such as sand filters, activated carbon adsorbers, laminated filters, and security filters, and appropriately added scale inhibitors, disinfectants, and chlorine removers. The concentrated solution that cannot pass through the reverse osmosis unit will enter the ion exchange system, and the desalinated water will be reused on the production line. The cleaning wastewater from each processing unit will be returned as raw water to the electroplating wastewater treatment system for treatment. Advantages of membrane treatment system: 1. High recovery rate and high quality of produced water; 2. The load of evaporation and crystallization is small; 3. Stable shutdown operation; 4. Can withstand fluctuations in incoming water quality; 5. Effectively control organic and physical pollution blockages; 6. Effectively control calcium silicon scaling and metal precipitation; Shengchuan is a professional manufacturer of membrane separation equipment, with a group of senior engineers in membrane engineering applications. After years of technological development and engineering practice, we have mastered advanced ultrafiltration, nanofiltration, reverse osmosis, and ceramic membrane technologies. Focus on designing and producing small-scale, pilot, and industrial equipment for customers. If you encounter any difficulties in membrane filtration, please feel free to contact us at any time, and we will have professional technicians to answer your questions.