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Pilot-Scale Study on Salt Separation of Industrial High-Salt Wastewater Based on Nanofiltration
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2022-05-11 , DOI: 10.1002/clen.202100232 Dan Liu 1 , Qiongqiong Liu 2 , Xujin Fu 1 , Hui Li 2 , Bin Zhou 2 , Weijie Xu 1 , Man Chai 1
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2022-05-11 , DOI: 10.1002/clen.202100232 Dan Liu 1 , Qiongqiong Liu 2 , Xujin Fu 1 , Hui Li 2 , Bin Zhou 2 , Weijie Xu 1 , Man Chai 1
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To explore the effect of nanofiltration on salt separation in high-salt wastewater, a pilot plant of nanofiltration combined with a “sand filtration–carbon filtration–ultrafiltration–ozone” pretreatment process is designed. The water used in the pilot-scale study is the sodium salt wastewater from a battery factory in Tianjin Binhai industrial park. Under the continuous and stable operation of the pilot plant, the key consideration is to investigate the retention rate of monovalent and divalent salt ions in high-salt wastewater by nanofiltration membranes. The results show that the combined process has a good removal effect on pollutants in wastewater. Among them, the removal rates of conventional pollutants such as turbidity, chemical oxygen demand (COD), and total dissolved solids (TDS) are 97.5, 92.35, and 87.06%, respectively. The retention rate of SO42− is as high as 99.7%, but there is a negative retention phenomenon of Cl−. The main inorganic salts Na2SO4 and NaCl in high-salt wastewater could be effectively separated. The efficiency of the combined process to remove pollutants and different salts mainly focuses on the nanofiltration part. The pretreatment has a specific removal effect on the turbidity and macromolecular organics of wastewater, reducing the pressure for the subsequent membrane process.
中文翻译：
基于纳滤的工业高盐废水分盐中试研究
为探索纳滤对高盐废水盐分分离的影响，设计了纳滤结合“砂滤-碳滤-超滤-臭氧”预处理工艺的中试装置。中试用水为天津滨海工业园区电池厂的钠盐废水。在中试装置持续稳定运行的情况下，主要考虑的是通过纳滤膜研究高盐废水中一价和二价盐离子的截留率。结果表明，该组合工艺对废水中的污染物具有良好的去除效果。其中，浊度、化学需氧量（COD）、总溶解固体（TDS）等常规污染物的去除率分别为97.5%、92.35%、87.06%。4 2-高达99.7%，但存在Cl -负滞留现象。可有效分离高盐废水中的主要无机盐Na 2 SO 4和NaCl。联合工艺去除污染物和不同盐类的效率主要集中在纳滤部分。预处理对废水的浊度和大分子有机物有特定的去除效果，降低后续膜工艺的压力。
更新日期：2022-05-11
中文翻译：
基于纳滤的工业高盐废水分盐中试研究
为探索纳滤对高盐废水盐分分离的影响，设计了纳滤结合“砂滤-碳滤-超滤-臭氧”预处理工艺的中试装置。中试用水为天津滨海工业园区电池厂的钠盐废水。在中试装置持续稳定运行的情况下，主要考虑的是通过纳滤膜研究高盐废水中一价和二价盐离子的截留率。结果表明，该组合工艺对废水中的污染物具有良好的去除效果。其中，浊度、化学需氧量（COD）、总溶解固体（TDS）等常规污染物的去除率分别为97.5%、92.35%、87.06%。4 2-高达99.7%，但存在Cl -负滞留现象。可有效分离高盐废水中的主要无机盐Na 2 SO 4和NaCl。联合工艺去除污染物和不同盐类的效率主要集中在纳滤部分。预处理对废水的浊度和大分子有机物有特定的去除效果，降低后续膜工艺的压力。
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