ZHOUQuan,ZHANGYao,ZHANGCheng-jiong,et al.Pilot Study on Treatment of Yellow River Water through Ultrafiltration-Nanofiltration Hybrid Membrane Process[J].China Water & Wastewater,2024,40(21):43-47.
Pilot Study on Treatment of Yellow River Water through Ultrafiltration-Nanofiltration Hybrid Membrane Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第21期
Page:
43-47
Column:
Date of publication:
2024-11-01
- Abstract:
- A pilot system of ultrafiltration(UF)-nanofiltration(NF) hybrid membrane process with a processing capacity of 6 m3/h was established for the treatment of Yellow River water, and its treatment performance and energy consumption were examined. The average removal efficiencies of the NF system for conductivity and total hardness were 90.64% and 94.96%, respectively. The NF system was capable of restoring 97% of its decontamination capacity through alkali cleaning and acid cleaning. A considerable amount of calcium carbonate precipitate was discovered in the wastewater tank, leading to an 18% reduction in the concentrate TDS. Meanwhile, the application of calcium hydroxide could decrease the concentrate TDS by up to 30.21%, enabling it to reach 820 mg/L and fulfilling the requirements for direct discharge into the urban sewer. The NF system exhibited lower energy consumption under higher operating pressure, higher flow rate, and higher raw water temperature. The energy consumption under the optimal working condition was 0.780 9 kW·h/m3. Through the application of multiple regression analysis, the influences of operating pressure, flow rate, and raw water temperature on the energy consumption of the NF system could be delineated by the regression equation.
Last Update:
2024-11-01