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Performance of ion exchange resin pretreatment to mitigate reverse osmosis membrane scaling

Authors： Liang Zheng, Yan Mengying, Li Jun, Huang Manhong

Units： College of Environmental Science and Engineering，Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University，Shanghai 201620，China

KeyWords： Ion exchange resin, Reverse Osmosis, Printing and dyeing wastewater, Membrane scaling.

ClassificationCode：TQ 028 X703.1

year,volume(issue):pagination： 2022,42(5):146-153

Abstract：

The ion exchange resin was used for pretreatment to reduce membrane scaling in reverse osmosis. The effect of pretreated wastewater on reverse osmosis membrane scaling was studied by optimizing the ion exchange resin treatment process, and the mechanism of its effect on reverse osmosis membrane scaling was analyzed by means of scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and other characterization methods. The results showed that the ion exchange resin pretreatment treatment could remove more than 98% of the hardness of the secondary sedimentation tank effluent, and the alkaline conditions were favorable to the removal of heavy metal Sb by ion exchange resin, and the removal efficiency of Ca, Mg and Sb elements could reach 98.31%, 99.46% and 66.76%, respectively, when the ion exchange resin concentration was 200 g/L. The initial flux increased from 32.53 L·m-2·h-1 to 39.57 L·m-2·h-1 after ion exchange resin treatment. This study can provide technical reference for the deep treatment of printing and dyeing waste water by reverse osmosis.

Funds：

国家重点研发计划（2019YFC0408304）,中央高校基本科研业务费专项资金((2232022G-04)

AuthorIntro：

梁正（1996-），男，山东威海人，硕士研究生，研究方向：反渗透的组合工艺及其应用。E-mail: exw312910@163.com

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