Donghua University has recently completed the "Research and Application Project of Novel Macroporous Fiber Membrane in Wastewater Treatment and Reuse." The project was evaluated by the Shanghai Institute of Sci-tech Information, and its outcomes have reached international advanced standards while leading domestically. The research team filed seven invention patents, four of which have been approved. They developed a membrane combination technology tailored for treating wastewater from textile, printing, dyeing, and landfill leachate. This technology has been applied in various fields, such as PVA recovery from desizing wastewater, solvent recovery in Lyocell fiber production, and car wash wastewater treatment and reuse.
Currently, complete systems with capacities of 120 tons/day, 300 tons/day, and 500 tons/day have been designed, promoted, and implemented in Shanghai, Shandong, Zhejiang, and other regions. These systems have delivered significant environmental, social, and economic benefits.
Membrane separation technology is often regarded as the "water treatment technology of the 21st century," widely used in drinking water purification, seawater desalination, and high-purity product manufacturing. However, its application in wastewater treatment and reuse remains limited due to two main challenges: high costs of membrane materials and modules, and high energy consumption caused by the extremely small pore size required for efficient separation.
To address these issues, Donghua University has successfully developed a large-flux, low-cost membrane combination technology that aligns with China's economic and technical conditions. This includes dynamic coating technology and control methods for ceramic membranes. Through extensive testing, they developed five series of fiber membranes suitable for advanced wastewater treatment and reuse, including pretreatment stages. They also completed the development of full-scale equipment. The new composite fiber membranes offer high throughput at a cost only a quarter of traditional ultrafiltration systems, making them a more sustainable and economically viable option for wastewater treatment.
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