Multistage-batch electrodialysis to concentrate high-salinity solutions: Process optimisation, water transport, and energy consumption

Yan, Haiyang; Wang, Yaoming; Wu, Liang; Shehzad, Muhammad Aamir; Jiang, Chenxiao; Fu, Rongqiang; Liu, Zhaoming; Xu, Tongwen

doi:10.1016/j.memsci.2018.10.008

Cited by 100 publications

(46 citation statements)

References 31 publications

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“…These CEMs have already been successfully used in conventional ED to extract gamma-aminobutyric acid [ 35 ], methylsulfonylmethane [ 36 ], sugar, sweet ingredients, and animal and plant extracts [ 37 ] from reaction mixtures that contain mineral impurities, as well as in reverse electrodialysis used as a renewable energy supply when processing mixed solutions of chloride with sulfate and humic acid [ 38 ]. These membranes have been also applied to salt concentration [ 39 ], separation in bioproducts [ 40 , 41 , 42 ], and desalination of plant extract [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

Transport and Electrochemical Characteristics of CJMCED Homogeneous Cation Exchange Membranes in Sodium Chloride, Calcium Chloride, and Sodium Sulfate Solutions

et al. 2020

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Recently developed and produced by Hefei Chemjoy Polymer Material Co. Ltd., homogeneous CJMC-3 and CJMC-5 cation-exchange membranes (CJMCED) are characterized. The membrane conductivity in NaCl, Na2SO4, and CaCl2 solutions, permeability in respect to the NaCl and CaCl2 diffusion, transport numbers, current–voltage curves (CVC), and the difference in the pH (ΔpH) of the NaCl solution at the desalination compartment output and input are examined for these membranes in comparison with a well-studied commercial Neosepta CMX cation-exchange membrane produced by Astom Corporation, Japan. It is found that the conductivity, CVC (at relatively low voltages), and water splitting rate (characterized by ΔpH) for both CJMCED membranes are rather close to these characteristics for the CMX membrane. However, the diffusion permeability of the CJMCED membranes is significantly higher than that of the CMX membrane. This is due to the essentially more porous structure of the CJMCED membranes; the latter reduces the counterion permselectivity of these membranes, while allowing much easier transport of large ions, such as anthocyanins present in natural dyes of fruit and berry juices. The new membranes are promising for use in electrodialysis demineralization of brackish water and natural food solutions.

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Section: Introductionmentioning

confidence: 99%

Transport and Electrochemical Characteristics of CJMCED Homogeneous Cation Exchange Membranes in Sodium Chloride, Calcium Chloride, and Sodium Sulfate Solutions

et al. 2020

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“…The initial concentration in dilute and defluoridation efficiency of our current results were limited in comparison to the results from demineralization of seawater and wastewater with ED . Some practical measurements have been carried out in various fields to enhance defluoridation efficiency.…”

Section: Resultsmentioning

confidence: 77%

“…Instant brick tea with a fluoride content of 2711 ± 82 mg kg −1 (dry weight) was purchased from Zhejiang MingHuang Food Shares Development Co. Ltd (Zhejiang Province, China). An ED stack was equipped with five‐cell pairs (CJMC‐5 for the cation‐exchange membrane and CJMA‐6 for the anion‐exchange membrane) provided by Hefei Chem Joy Polymers Co. Ltd (China) . The effective area of each membrane was 168 cm 2 .…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the feasibility of short‐term electrodialysis for separating naturally occurring fluoride from instant brick tea infusion

et al. 2019

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BACKGROUND: Removing excessive naturally occurring fluoride from tea and/or infusions is difficult because the process has low efficiency and causes secondary pollution. In this study, a novel electrodialysis (ED) technology was developed. We examined the effect of crucial parameters (electrolyte concentration, operation voltage, ED duration and initial concentration of the tea infusion) on defluoridation performance using a highly efficient ion-exchange membrane with five-compartment cells. RESULTS:The most effective ED system results were obtained at an electrolyte concentration of 10 g kg −1 and operating voltage of 20 V. Moreover, the fluoride removal capacity (10.70-66.93%) was highly dependent on the ED duration (1-15 min) and initial concentration of the tea infusion (0.5-10 g kg −1 ). The longer the ED duration and the lower the initial concentration, the higher was the defluoridation performance. During ED, limited loss of the main inclusions (total polyphenols, catechins, caffeine and selected ions) was observed. Furthermore, the D201 anion resin-filled ED stack (0.5-5 g) and improvement of concentrate compartment electrolyte (≥5 times the dilute compartment electrolyte) in the ED system enhanced the defluoridation rate significantly. CONCLUSION: ED is a potentially effective method that can be used for defluoridation in the deep processing of tea products. (Wan) † Chuan-yi Peng and Hai-feng Liu contributed equally to this work.Figure 4. Effect of ED duration on defluoridation capacity. ED process parameters were 20 V operation voltage, 10 g kg −1 initial concentration of the tea infusion, 10 g kg −1 electrolyte concentration and 30 L h −1 flow rate.

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“…As in RED, also in normal ED the profits of multistaging were seen ([ 17 , 18 , 19 , 20 , 21 ]). The guiding idea is the principle of equipartition of entropy production as described by Tondeur and Kvaalen [ 22 ].…”

Section: Introductionmentioning

confidence: 91%

Reverse Electrodialysis: Co- and Counterflow Optimization of Multistage Configurations for Maximum Energy Efficiency

Veerman

2020

Membranes

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Reverse electrodialysis (RED) is one of the techniques able to harvest energy from the salinity gradient between different salt solutions. There is a tradeoff between efficiency and generated power in a RED stack. This paper focuses on efficiency. A simple model is presented to calculate the efficiency in a co-flow or counterflow operated stack. Moreover, the efficiency can be improved by applying multistaging; the stacks in such a system can also be interconnected externally in co- and counterflow. The four combinations of internally and externally flow modes are the base of further considerations concerning procedures for optimization of these configurations. Three methods for optimization the energy efficiency in a multistage system are discussed: (A) successively maximizing the power of each individual stage, (B) maximizing the power of the whole system by adjusting the electrical current in all stages simultaneously, and (C) maximizing the power of the whole system by adjusting the same current through each stage. Method C is the most attractive because it only requires one converter (cheaper and easier to control) while the results are hardly inferior to B and much better than A. An alternative to multistaging is electrode segmentation and the advantages and disadvantages of both systems are briefly discussed.

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Multistage-batch electrodialysis to concentrate high-salinity solutions: Process optimisation, water transport, and energy consumption

Cited by 100 publications

References 31 publications

Transport and Electrochemical Characteristics of CJMCED Homogeneous Cation Exchange Membranes in Sodium Chloride, Calcium Chloride, and Sodium Sulfate Solutions

Transport and Electrochemical Characteristics of CJMCED Homogeneous Cation Exchange Membranes in Sodium Chloride, Calcium Chloride, and Sodium Sulfate Solutions

Evaluation of the feasibility of short‐term electrodialysis for separating naturally occurring fluoride from instant brick tea infusion

Reverse Electrodialysis: Co- and Counterflow Optimization of Multistage Configurations for Maximum Energy Efficiency

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