There was a National Industrial Wastewater Treatment and Engineering Application of New Technology and Equipment seminar, in Hangzhou, recently, where a Hangzhou Water Treatment Technology Development Center representative reported on the use of double-membrane methods to treat wastewater from printing and dyeing. It discussed current treatment problems and countermeasures and demonstrated the advantages and prospects of the new technology, by analyzing a 30,000-ton/day wastewater treatment system, in the city of Foshan and a 5,000-ton/day system in Zhejiang’s Jiaming, from the angle of treated water quality, cost, and investment.