ZHAO Yong-zhi,GAO Yan,HE Wen-li,et al.Effect of Different Nanofiltration Membranes on Removal of Scale-forming Ions from Landfill Leachate[J].China Water & Wastewater,2021,37(23 23):57-60.
Effect of Different Nanofiltration Membranes on Removal of Scale-forming Ions from Landfill Leachate
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
23 23
Page:
57-60
Column:
Date of publication:
2021-12-01
- Abstract:
- To clarify the effect of different nanofiltration membranes on removal of scaling-forming ions from landfill leachate, characteristics of scaling-forming ion concentrations in the influent from landfill A and landfill B at different periods in nanofiltration membrane modules of the actual operation system were analyzed, and the removal performances of DK and TFC nanofiltration membrane modules on scale-forming ions were discussed.The contents of Ca2+, Mg2+, SO2-4, colloidal SiO2 and soluble SiO2 in the influent of the nanofiltration membrane were relatively high, which were the main scale-forming components in the nanofiltration membrane treatment. The relatively fresh landfill leachate in landfill B contained more Mg2+, Ca2+ ions and soluble SiO2 than the aged landfill leachate from landfill A. The DK membrane had a good removal performance of Mg2+, Ca2+, SO2-4 and TDS, and the removal efficiencies were 3.2 times, 2.3 times, 1.3 times and 1.8 times of the TFC membrane, respectively. In addition, acidbase cleaning method was recommended to clean the nanofiltration membrane modules according to engineering practice.
Last Update:
2021-12-01