XIEYa-wei,XUZhen-feng,QIUJia-qi,et al.Productive Test on Nanofiltration Membrane to Remove Organic Matter from Water and Improve Water Production Rate[J].China Water & Wastewater,2023,39(7):29-34.
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Productive Test on Nanofiltration Membrane to Remove Organic Matter from Water and Improve Water Production Rate

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第7期 Page: 29-34 Column: Date of publication: 2023-04-01
Author(s):
XIE　Ya-wei1;  XU　Zhen-feng1; 2;  QIU　Jia-qi1; 3;  ZHANG　Gang4;  LIU　Hong-yuan1;  SUN　Hai-ping4;  ZHU　Hai-tao4
（1. College of Civil Engineering， Zhejiang University of Technology， Hangzhou 310014， China； 2. Zhejiang Urban and Rural Planning Design Institute， Hangzhou 310030， China； 3. Ningbo Urban Construction Design and Research Institute Co. Ltd.， Ningbo 315000， China； 4. Jiaxing Water Investment Group Co. Ltd.， Jiaxing 314000， China）
Keywords:
nanofiltration;  organic matter;  nanofiltration concentrated water;  reverse osmosis;  disinfection by-products
Abstract:
In order to solve the problem that the existing coagulation precipitation and ozonation/activated carbon process in a water treatment plant in Zhejiang Province could not further remove organic matter in the water, a productive experiment was carried out on nanofiltration system with the treatment scale of 12 m3/h (three-stage nanofiltration membrane unit) and reverse osmosis unit was used to treat the concentrated water of nanofiltration system. The treated water quality of four types of nanofiltration membranes (A, B, C and D) and the effect of improving the water yield of the system by reverse osmosis were studied. The results showed that the removal rates of CODMn, TOC and UV254 in raw water were above 78% at the recovery rate of 90%, and the CODMn, TOC and UV254 in produced water were below 0.45 mg/L, 0.50 mg/L and 0.004 cm-1, respectively. After disinfection, 16 kinds of disinfection by-products were not detected in the water according to the Standards for Drinking Water Quality (GB 5749-2022), and the removal rate of the trihalomethane formation potential and haloacetic acid formation potential was over 89%. Nanofiltration membrane could also remove TDS and total hardness from water to improve taste. The reverse osmosis unit could increase the water yield of nanofiltration system to 97.5%. The total operation cost of nanofiltration system and reverse osmosis unit was estimated to be 1.28 yuan/m3, but how to dispose concentrated water is still a problem to be considered in the future.
Last Update: 2023-04-01