This product is independently developed by NEWA for the purification and separation of acidic wastewater, such as mining wastewater, mineral processing wastewater, metal processing wastewater, paper making and printing and dyeing wastewater treatment, with an acid resistance range of 20% sulphuric acid, hydrochloric acid; 5% nitric acid, so that the industries that produce waste acid, such as steel, non-ferrous metals, titanium dioxide and so on, are able to directly use the acid-resistant membranes to separate out the resourceful products, such as pure acid and ferrous sulfate, which can be recycled back to the production end.