Application of homogeneous membrane electrodialysis in the treatment of high-salt organic wastewater

He, Kuan; Liu, Deqing; Zhang, Hao; Zhang, Shenghan

doi:10.1088/1755-1315/227/6/062043

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Electrodialysis (ED) is an electrically driven membrane process in which the ions in solution are removed or concentrated due to the selectivity of the ion exchange membranes (IEMs). Currently, ED has been applied to the desalination of various high-salinity organic wastewaters [ 11 , 12 , 13 , 14 ], such as dairy wastes [ 15 , 16 , 17 ], brackish water [ 18 ], municipal wastewater [ 19 ], greenhouse wastewater [ 20 ], etc. For example, Luiz et al [ 21 ] applied laboratory-scale ED to the desalination of sugar cane juice (conductivity of 3.2 mS·cm −1 ), which has a similar composition as RSW, and removed the salts completely within a treatment time of 1 h.…”

Section: Introductionmentioning

confidence: 99%

Study on the Treatment of Refined Sugar Wastewater by Electrodialysis Coupled with Upflow Anaerobic Sludge Blanket and Membrane Bioreactor

Han

Xie

et al. 2023

Membranes

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In this paper, refined sugar wastewater (RSW) is treated by electrodialysis (ED) coupled with an upflow anaerobic sludge blanket (UASB) and membrane bioreactor (MBR). The salt in RSW was first removed by ED, and then the remaining organic components in RSW were degraded by a combined UASB and MBR system. In the batch operation of ED, the RSW was desalinated to a certain level (conductivity < 6 mS·cm−1) at different dilute to concentrated stream volume ratios (VD/VC). At the volume ratio of 5:1, the salt migration rate JR and COD migration rate JCOD were 283.9 g·h−1·m−2 and 13.84 g·h−1·m−2, respectively, and the separation factor α (defined as JCOD/JR) reached a minimum value of 0.0487. The ion exchange capacity (IEC) of ion exchange membranes (IEMs) after 5 months of usage showed a slight change from 2.3 mmol·g−1 to 1.8 mmol·g−1. After the ED treatment, the effluent from the tank of the dilute stream was introduced into the combined UASB-MBR system. In the stabilization stage, the average COD of UASB effluent was 2048 mg·L−1, and the effluent COD of MBR was maintained below 44–69 mg·L−1, which met the discharge standard of water contaminants for the sugar industry. The coupled method reported here provides a viable idea and an effective reference for treating RSW and other similar industrial wastewaters with high salinity and organic contents.

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Section: Introductionmentioning

confidence: 99%

Study on the Treatment of Refined Sugar Wastewater by Electrodialysis Coupled with Upflow Anaerobic Sludge Blanket and Membrane Bioreactor

Han

Xie

et al. 2023

Membranes

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“…Highly saline wastewater is defined as wastewater containing organic matter and total dissolved solids (TDS) at a concentration of at least 3.5% by mass [ 1 ]. It mainly comes from production processes in several industries such as chemical, pharmaceutical, petroleum, paper, dairy processing, and food canning.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Acid and Alkaline from Industrial Saline Wastewater by Bipolar Membrane Electrodialysis under High-Chemical Oxygen Demand Concentration

Lü

Shao

et al. 2022

Molecules

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Actual high saline wastewater containing concentrated organics and sodium chloride is a bioenergy and renewable resource. This study compared two different bipolar membrane electrodialysis membranes from two companies’ stacks to recover HCl and NaOH from sodium chloride solution and actual chemical wastewater. The results demonstrated that the electrolysis rates were around 1.5 kg/m2h, the HCl and NaOH production rates were about 0.9 kg/m2h, energy consumption was in the range of 1.05–1.27 kWh/kg, and the economic benefits were above 1 yuan/h in BMED systems. From analyzing the performance of seven different BMED membrane stacks, the B2 stack was chosen for electrolyzing actual high salt wastewater to observe the effect of chemical oxygen demand on BMED systems, where electrolytic salt performance, HCl-NaOH alkali production rates, and energy consumption show linear dependence on time for 5000 mg/L chemical oxygen demand wastewater. It illustrated chemical oxygen demand can enhance energy consumption and reduce electrolytic salt performance and the acid and alkali production rates, due to improving the membrane area resistance. In this study, the effect of high COD saline wastewater on the performance of a BMED membrane stack was clarified and the mechanism was analyzed for its practical application in treating chemical high salt wastewater.

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Application of homogeneous membrane electrodialysis in the treatment of high-salt organic wastewater

Cited by 2 publications

References 7 publications

Study on the Treatment of Refined Sugar Wastewater by Electrodialysis Coupled with Upflow Anaerobic Sludge Blanket and Membrane Bioreactor

Study on the Treatment of Refined Sugar Wastewater by Electrodialysis Coupled with Upflow Anaerobic Sludge Blanket and Membrane Bioreactor

Recovery of Acid and Alkaline from Industrial Saline Wastewater by Bipolar Membrane Electrodialysis under High-Chemical Oxygen Demand Concentration

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