China Makes Breakthrough in Recycling of Waste Diluted Sulfuric Acid   

The treatment of sulfuric acid-containing wastewater is a major problem that has bothered the domestic sulfuric acid players for a long time. Presently, most sulfuric acid producers use lime to treat sulfuric acid-containing wastewater. This can lead to not only a large amount of slag and secondary pollution but also losses of valuable sulfur resources. Thus, sulfuric acid producers urgently need a feasible technology to recycle sulfuric acid from their wastewater. Because of this, Shanghai-based CN Water & Waste Ltd has recently developed a new technology for recycling waste diluted sulfuric acid by combining new-type ion-exchange resin with membrane technologies. This new technology can effectively separate sulfuric acid and dissolved salts from wastewater, increasing the recycling rate of sulfuric acid, and greatly reducing the discharge of sulfuric acid-containing wastewater and the generation of waste slag.