Pilot study on application of nanofiltration-reverse osmosis integrated membrane in desalination and separation of high-salinity wastewater
CHEN Wei1, LIU Dan1, LIU Qiong-qiong1,2, XU Wei-jie1, CHAI Man1, ZENG Hui1
1. Tianjin Huanke Environment Consulting Company Limited, Tianjin 300191, China; 2. Tianjin Academy of Eco-Environmental Sciences, Tianjin 300191, China
Abstract: In order to explore the desalination and separation effects of nanofiltration-reverse osmosis integrated membrane technology in industrial high-salinity wastewater, a series of experiments are conducted with high-salinity wastewater generated by an enterprise in Nangang Industrial Park in Tianjin, China as wastewater samples, focusing on the rejection of monovalent and divalent anions and cations in wastewater by the integrated membranes.It is shown that the nanofiltration-reverse osmosis integrated membrane process has a significant effect on the desalination rate of high-salinity wastewater.The nanofiltration membrane shows a retention rate of as high as 99.02% for SO42- and gives a negative rejection for Cl-, so that Na2SO4 and NaCl can be effectively separated.The reverse osmosis membrane mainly removes NaCl, exhibiting a retention rate over 95% for Cl-.In addition, the nanofiltration-reverse osmosis integrated membrane technology also presents a good removal effect on the chroma, COD and other conventional pollutants in wastewater.
陈伟, 刘丹, 刘琼琼, 徐威杰, 柴曼, 曾辉. 纳滤-反渗透集成膜用于高盐废水脱盐分质的中试研究[J]. 现代化工, 2021, 41(12): 208-212.
CHEN Wei, LIU Dan, LIU Qiong-qiong, XU Wei-jie, CHAI Man, ZENG Hui. Pilot study on application of nanofiltration-reverse osmosis integrated membrane in desalination and separation of high-salinity wastewater. Modern Chemical Industry, 2021, 41(12): 208-212.
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