XiangFan,LiMing,MaZongkai,et al.Performance of a Novel Gravity-driven and Chemical Cleaning-free Ultrafiltration Membrane Device in Treating Mountain Stream Water[J].China Water & Wastewater,2026,42(17):55-60.
Performance of a Novel Gravity-driven and Chemical Cleaning-free Ultrafiltration Membrane Device in Treating Mountain Stream Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第17期
Page:
55-60
Column:
Date of publication:
2026-09-01
- Abstract:
- To address the challenges in rural water supply, including significant fluctuations in raw water quality, dependence on chemical agents in conventional treatment processes, and the high energy consumption associated with frequent cleaning in membrane technologies, this study developed a gravity-driven, chemical cleaning-free water purification device based on a novel PVDF super- hydrophilic membrane. The device employs a short process integrating “multi-stage pretreatment and gravity-flow ultrafiltration”, eliminating the need for coagulants and chemical cleaning agents. During a six-month pilot test with a capacity of 100 m3/d using a mountain stream source, the influent turbidity fluctuated between 2 NTU and 1 500 NTU. The device demonstrated excellent resistance to shock loads and operational stability: the effluent turbidity remained consistently ≤0.3 NTU, and all microbial indicators met the required standards. The core membrane system, relying solely on daily automatic air scrubbing for maintenance, maintained a stable transmembrane pressure below 5.0 kPa, achieving long- term “chemical cleaning-free” operation. The system’s specific energy consumption was only 0.035 kW·h/m3, with a water recovery rate of 98.5%. Through the innovative integration of super-hydrophilic membrane materials with the “gravity-driven and air-scouring maintenance” mode, this research provides a low-carbon, efficient, and easily maintainable drinking water treatment solution for remote areas.
Last Update:
2026-09-01