Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis
A large amount of mine water is generated during coal production, which not only damages the surface environment and ecology but also wastes groundwater resources in the mining area, exacerbating regional water scarcity. In this work, a novel zero liquid discharge technology combining selectrodialys...
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MDPI AG
2023-04-01
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| Online Access: | https://www.mdpi.com/2297-8739/10/4/269 |
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| author | Xueting Zhao Xinhao Cheng Jinshan Sun Jialin Liu Zhaofeng Liu Yali Wang Jiefeng Pan |
| author_facet | Xueting Zhao Xinhao Cheng Jinshan Sun Jialin Liu Zhaofeng Liu Yali Wang Jiefeng Pan |
| author_sort | Xueting Zhao |
| collection | DOAJ |
| description | A large amount of mine water is generated during coal production, which not only damages the surface environment and ecology but also wastes groundwater resources in the mining area, exacerbating regional water scarcity. In this work, a novel zero liquid discharge technology combining selectrodialysis (SED) and bipolar membrane electrodialysis (BMED) was developed for the resourceful treatment of low-salinity mineralized wastewater. The SED stack had demonstrated to be workable for the elimination of multivalent ions. The BMED stack converts brine into acid and base. After SED, a high pure crude salt (~98%) was attained. Furthermore, under the conditions of a current density of 20 mA/cm<sup>2</sup>, a flow velocity of 20 L/h, and an initial acid/base concentration of 0.10 mol/L, the maximum concentrations of acid and base were found to be 0.75 mol/L and 0.765 mol/L, respectively, for a feed conductivity of 55 mS/cm. The cost of the entire electrodialysis stage was evaluated to be USD 1.38/kg of NaOH. Therefore, this combined UF-RO-SED-BMED process may be an effective strategy for the sustainable treatment of low-salinity mineralized wastewater. |
| first_indexed | 2024-03-11T04:31:54Z |
| format | Article |
| id | doaj.art-4bb7154f70794fdfb2bf0e81b5db8827 |
| institution | Directory Open Access Journal |
| issn | 2297-8739 |
| language | English |
| last_indexed | 2024-03-11T04:31:54Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj.art-4bb7154f70794fdfb2bf0e81b5db88272023-11-17T21:20:52ZengMDPI AGSeparations2297-87392023-04-0110426910.3390/separations10040269Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane ElectrodialysisXueting Zhao0Xinhao Cheng1Jinshan Sun2Jialin Liu3Zhaofeng Liu4Yali Wang5Jiefeng Pan6College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaState Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 100049, ChinaDepartment of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaA large amount of mine water is generated during coal production, which not only damages the surface environment and ecology but also wastes groundwater resources in the mining area, exacerbating regional water scarcity. In this work, a novel zero liquid discharge technology combining selectrodialysis (SED) and bipolar membrane electrodialysis (BMED) was developed for the resourceful treatment of low-salinity mineralized wastewater. The SED stack had demonstrated to be workable for the elimination of multivalent ions. The BMED stack converts brine into acid and base. After SED, a high pure crude salt (~98%) was attained. Furthermore, under the conditions of a current density of 20 mA/cm<sup>2</sup>, a flow velocity of 20 L/h, and an initial acid/base concentration of 0.10 mol/L, the maximum concentrations of acid and base were found to be 0.75 mol/L and 0.765 mol/L, respectively, for a feed conductivity of 55 mS/cm. The cost of the entire electrodialysis stage was evaluated to be USD 1.38/kg of NaOH. Therefore, this combined UF-RO-SED-BMED process may be an effective strategy for the sustainable treatment of low-salinity mineralized wastewater.https://www.mdpi.com/2297-8739/10/4/269selectrodialysisbipolar membrane electrodialysismineralized wastewaterrecoveryinfluence factors |
| spellingShingle | Xueting Zhao Xinhao Cheng Jinshan Sun Jialin Liu Zhaofeng Liu Yali Wang Jiefeng Pan Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis Separations selectrodialysis bipolar membrane electrodialysis mineralized wastewater recovery influence factors |
| title | Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis |
| title_full | Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis |
| title_fullStr | Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis |
| title_full_unstemmed | Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis |
| title_short | Zero Liquid Discharge and Resource Treatment of Low-Salinity Mineralized Wastewater Based on Combing Selectrodialysis with Bipolar Membrane Electrodialysis |
| title_sort | zero liquid discharge and resource treatment of low salinity mineralized wastewater based on combing selectrodialysis with bipolar membrane electrodialysis |
| topic | selectrodialysis bipolar membrane electrodialysis mineralized wastewater recovery influence factors |
| url | https://www.mdpi.com/2297-8739/10/4/269 |
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